Opinion polling for the 2020 Republican Party presidential primaries

Lua error in package.lua at line 80: module 'strict' not found. This is a list of nationwide and statewide public opinion polls that have been conducted relating to the Republican primaries for the 2020 United States presidential election. The persons named in the polls are declared candidates or have received media speculation about their possible candidacy. The polls included are among Republicans or Republicans and Republican-leaning independents. If multiple versions of polls are provided, the version among likely voters is prioritized, then registered voters, then adults.

Background

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	Active campaign		Exploratory committee		Withdrawn candidate
	Midterm elections		Iowa caucuses		Super Tuesday		Republican convention

National polling

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Donald Trump	Joe Walsh	Bill Weld	Other and undecided^{[lower-alpha 1]}
270 to Win	Jan 1, 2020	Dec 17 – 31, 2019	86.6%	2.0%	1.8%	8.6%
RealClearPolitics	Dec 18, 2019	Dec 10 – 17, 2019	88.7%	3.0%	3.0%	5.3%
Average			87.7%	2.5%	2.4%	7.4%

Since December 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Rocky De La Fuente	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
YouGov/Economist	Jan 11-14	362 (LV)	–	1%	88%	1%	1%	1%^{[lower-alpha 3]}	9%
YouGov/The Economist	Jan 5-7	399 (LV)	–	1%	87%	1%	2%	1%^{[lower-alpha 4]}	7%
YouGov/The Economist	Dec 28-31	359 (LV)	–	1%	89%	1%	2%	1%^{[lower-alpha 5]}	6%
YouGov/Economist	Dec 22-24	415 (LV)	–	1%	91%	2%	1%	0%^{[lower-alpha 6]}	5%
McLaughlin & Associates	Dec 14-18	399 (LV)	–	–	83%	2%	3%	0%^{[lower-alpha 7]}	11%
Emerson College	Dec 15-17	492 (LV)	–	–	90%	5%	5%	–	–
YouGov/Economist	Dec 14-17	354 (LV)	–	1%	88%	2%	2%	0%^{[lower-alpha 8]}	7%
Suffolk University	Dec 10-14	329 (LV)	–	–	88%	2%	2%	0%^{[lower-alpha 9]}	7%
YouGov/Economist	Dec 7-10	422 (LV)	–	–	88%	2%	2%	1%^{[lower-alpha 10]}	8%
YouGov/Economist	Dec 1-3	417 (LV)	–	–	89%	2%	3%	–	6%

June 2019 to November 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
YouGov/Economist	Nov 24-26	402 (LV)	–	–	89%	2%	3%	1%^{[lower-alpha 11]}	6%
RealClear Opinion Research	Nov 15-21	780 (LV)	–	–	89%	6%	1%	–	11%
Emerson College	Nov 17-20	426 (LV)	–	–	93%	4%	3%	–	–
YouGov/Economist	Nov 17-19	383 (LV)	–	–	90%	2%	1%	–	7%
	Nov 12	Sanford withdraws from the race
YouGov/Economist	Nov 10-12	352 (LV)	–	3%	89%	1%	1%	1%^{[lower-alpha 12]}	5%
YouGov/Economist	Nov 3-5	402 (LV)	–	1%	87%	1%	3%	1%^{[lower-alpha 13]}	8%
YouGov/Economist	Oct 27-29	464 (LV)	–	3%	83%	2%	2%	1%^{[lower-alpha 14]}	9%
Suffolk University/USA Today [1]	Oct 23-26	323 (LV)	± 5.5%	1%	85%	1%	2%	–	11%
YouGov/Economist	Oct 20-22	404 (LV)	–	3%	87%	1%	1%	1%^{[lower-alpha 15]}	8%
McLaughlin and Associates	Oct 17-22	411	–	1%	76%	1%	2%	9%^{[lower-alpha 16]}	12%
Emerson College	Oct 18-21	378	± 4.9%	3%	91%	2%	5%	–	–
Ipsos	Oct 17-18	507	± 5.7%	1%	79%	1%	1%	8%^{[lower-alpha 17]}	11%
YouGov/Economist	Oct 10–13	354	–	2%	86%	2%	3%	–	5%
YouGov/Economist	Oct 6–8	473	± 2.9%	1%	84%	3%	3%	–	8%
YouGov/Economist	Sep 28 – Oct 1	360	± 2.6%	3%	86%	2%	2%	–	7%
Quinnipiac University	Sep 19–23	568	± 4.9%	2%	80%	2%	2%	1%	12%
Emerson College	Sep 21–23	363	± 5.1%	3%	89%	5%	4%	–	–
Fox News	Sep 15–17	341	± 5.0%	2%	86%	2%	2%	1%	5%
YouGov/Economist	Sep 14–17	416	± 2.7%	2%	86%	1%	5%	1%	5%
Emerson College	Sep 13–16	208	± 3.3%	6%	86%	4%	4%	–	–
Public Religion Research Institute	Aug 22 – Sep 15	957	± 2.8%	–	74%	–	10%	13%	3%^{[lower-alpha 18]}
HarrisX	Sep 9–12	1,175	–	2%	76%	2%	2%	4%	14%
Democracy Corps	Sep 7–11	315	–	4%	85%	5%	2%	1%	4%
YouGov/Economist	Sep 8–10	393	± 2.7%	3%	82%	1%	4%	2%	7%
McLaughlin & Associates	Sep 7–10	416	–	3%	76%	1%	3%	–	17%
	Sep 8	Sanford announces his candidacy
Emerson College	Aug 24–26	482	± 2.5%	–	84%	–	16%	–	–
HarrisX	Aug 23–26	1,194	–	–	76%	5%	3%	6%	10%
	Aug 25	Walsh announces his candidacy
Suffolk University	Aug 20–25	289	–	–	90%	–	5%	–	5%
McLaughlin & Associates	Jul 23–28	415	± 4.0%	4%	81%	–	2%	–	14%
Democracy Corps	Jul 18–28	354	± 4.0%	4%	89%	–	4%	–	3%
Emerson College	Jun 21–24	407	± 4.9%	–	83%	–	17%	–	–
McLaughlin & Associates	Jun 18–24	417	-	–	79%	–	7%	–	13%
Suffolk University/USA Today	Jun 11–15	326	–	–	90%	–	5%	–	5%

November 2018 to May 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Jeb Bush	Bob Corker	Ted Cruz	Jamie Dimon	Jeff Flake	Nikki Haley	Larry Hogan	John Kasich	Mike Pence	Mitt Romney	Paul Ryan	Ben Sasse	Donald Trump	Bill Weld	Other	Undecided
HarrisX	May 23–25	785	± 4.0%	–	–	–	–	–	–	–	–	–	–	–	–	73%	7%	5%	13%
Change Research	May 18–21	1,248	± 2.8%	–	2%	–	–	–	–	–	–	–	–	–	–	94%	–	–	4%
				–	–	–	–	–	7%	–	–	–	–	–	–	87%	–	–	6%
				–	–	–	–	–	–	–	3%	–	–	–	–	94%	–	–	3%
Emerson College	May 10–13	384	± 5.0%	–	–	–	–	–	–	–	–	–	–	–	–	86%	14%	–	–
McLaughlin & Associates	May 7–11	330	–	–	–	–	–	–	–	1%	5%	–	–	–	–	77%	3%	–	14%
Zogby Analytics	May 2–9	463	–	–	–	–	–	–	–	–	–	–	–	–	–	81%	4%	10%	6%
Quinnipiac University	Apr 26–29	419	± 5.6%	–	–	–	–	–	–	3%	–	–	–	–	–	84%	3%	1%	8%
HarrisX	Apr 26–28	641	± 4.0%	–	–	–	–	–	–	–	–	–	–	–	–	75%	7%	4%	11%
Morning Consult	Apr 19–21	641	± 4.0%	–	–	–	–	–	–	–	–	–	–	–	–	78%	7%	–	15%
Ipsos/Reuters	Apr 18–19	344	± 5.9%	–	–	–	1%	1%	5%	–	4%	10%	–	–	–	60%	–	2%	16%
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Apr 11–14	324	± 5.4%	–	–	–	–	–	–	–	–	–	–	–	–	85%	15%	–	–
Ipsos/Reuters	Mar 25–26	362	± 5.9%	–	–	–	1%	0%	3%	–	5%	8%	–	–	–	63%	–	4%	16%
Morning Consult	Mar 22–24	638	± 4.0%	–	–	–	–	–	–	9%	–	–	–	–	–	73%	–	–	18%
				–	–	–	–	–	–	–	13%	–	–	–	–	72%	–	–	16%
				–	–	–	–	–	–	–	–	–	–	–	–	74%	8%	–	18%
McLaughlin & Associates	Mar 20–24	418	–	–	–	–	–	–	–	–	5%	–	–	–	–	80%	1%	–	14%
Emerson College	Mar 17–18	483	–	–	–	–	–	–	–	–	–	–	–	–	–	90%	10%	–	–
Ipsos/Reuters	Mar 5–11	756	± 4.1%	–	1%	–	0%	0%	3%	–	3%	–	9%	–	0%	69%	–	2%	13%
Monmouth University	Mar 1–4	339	± 5.3%	–	–	–	–	–	–	6%	–	–	–	–	–	75%	–	–	16%
Monmouth University	Mar 1–4	339	± 5.3%	–	–	–	–	–	–	–	–	–	–	–	–	74%	8%	–	18%
Ipsos/Reuters	Feb 26 – Mar 4	1,086	± 3.4%	–	1%	–	0%	1%	5%	–	3%	–	9%	–	1%	66%	–	3%	13%
Ipsos/Reuters	Feb 19–25	1,138	± 3.3%	–	0%	–	1%	1%	4%	–	4%	–	8%	–	1%	65%	–	3%	14%
Ipsos/Reuters	Feb 12–18	1,040	± 3.5%	–	0%	–	1%	1%	3%	–	4%	–	8%	–	1%	69%	–	2%	12%
Emerson College	Feb 14–16	366	± 5.1%	–	–	–	–	–	–	–	–	–	–	–	–	85%	15%	–	–
FOX News	Feb 10-12	432 (A)	±4.5%	–	–	–	–	–	–	–	–	–	–	–	–	72%	–	17%	11%
McLaughlin & Associates	Feb 6–10	413	–	–	–	–	–	–	–	–	6%	–	10%	–	–	72%	–	–	11%
Monmouth University	Jan 25–27	335	± 5.4%	–	–	21%	–	–	–	–	–	–	–	–	–	66%	–	–	9%
Monmouth University	Jan 25–27	335	± 5.4%	–	–	–	–	–	–	–	14%	–	–	–	–	73%	–	–	11%
Zogby Analytics	Jan 18–20	307	± 5.6%	2%	–	–	–	1%	6%	–	8%	–	9%	–	–	64%	–	4%	6%
HarrisX	Jan 4–5	320	–	–	–	–	–	–	–	–	–	–	17%	–	–	70%	–	–	13%
	2019
McLaughlin & Associates	Dec 10–14	392	–	–	–	–	–	2%	–	–	5%	–	9%	–	–	72%	–	–	12%
Harvard-Harris	Nov 27–28	819	–	3%	–	5%	–	2%	2%	–	6%	–	6%	5%	1%	44%	–	2%	16%
HarrisX	Nov 16–17	320	–	–	–	17%	–	–	–	–	–	–	–	–	–	66%	–	–	17%
				–	–	–	–	9%	–	–	–	–	–	–	–	70%	–	–	21%
				–	–	–	–	–	13%	–	–	–	–	–	–	69%	–	–	18%
				–	–	–	–	–	–	–	14%	–	–	–	–	67%	–	–	19%
				–	–	–	–	–	–	–	–	–	19%	–	–	69%	–	–	12%
				–	–	–	–	–	–	–	–	–	–	20%	–	65%	–	–	15%
				–	–	–	–	–	–	–	–	–	–	–	8%	70%	–	–	21%

Before November 2018

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Bob Corker	Tom Cotton	Ted Cruz	Jeff Flake	Nikki Haley	John Kasich	Mike Pence	Mitt Romney	Marco Rubio	Ben Sasse	Donald Trump	Other	Undecided
Harvard-Harris	Jun 24–25	430	–	15%	–	–	–	–	–	–	–	–	–	85%	–	–
GQR Research	Jan 6–11	374	–	–	–	4%	1%	4%	3%	11%	5%	5%	–	62%	0%	5%
	2018
Public Policy Polling	Dec 11–12	–	–	–	–	21%	–	–	–	–	–	–	–	64%	–	15%
				–	–	–	16%	–	–	–	–	–	–	74%	–	10%
				–	–	–	–	–	19%	–	–	–	–	70%	–	11%
				–	–	–	–	–	–	22%	–	–	–	62%	–	15%
Public Policy Polling	Oct 27–29	–	–	–	–	27%	–	–	–	–	–	–	–	57%	–	16%
				–	–	–	14%	–	–	–	–	–	–	70%	–	16%
				–	–	–	–	–	24%	–	–	–	–	66%	–	11%
				–	–	–	–	–	–	28%	–	–	–	53%	–	19%
Public Policy Polling	Sep 22–25	–	–	–	–	15%	–	–	–	–	–	–	–	68%	–	17%
				–	–	–	–	–	18%	–	–	–	–	68%	–	13%
				–	–	–	–	–	–	21%	–	–	–	59%	–	21%
Fabrizio Lee	Aug 2017	1,500	± 2.5%	–	1%	13%	–	–	10%	–	–	–	1%	54%	–	20%
Public Policy Polling	Aug 18–21	–	–	–	–	22%	–	–	–	–	–	–	–	62%	–	17%
				–	–	–	–	–	21%	–	–	–	–	68%	–	11%
				–	–	–	–	–	–	24%	–	–	–	52%	–	23%
Opinion Savvy	Aug 16–17	220	± 6.6%	–	–	8%	–	–	17%	–	–	–	–	68%	–	7%
Opinion Savvy	Aug 16–17	221	± 6.6%	–	–	12%	–	–	15%	65%	–	–	–	–	–	8%
Marist College	Aug 8–12	361	± 5.2%	–	–	–	–	–	23%	–	–	–	–	64%	–	10%
Marist College	Aug 8–12	361	± 5.2%	–	–	–	–	–	–	33%	–	–	–	56%	–	8%

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Other	Undecided
ABC News/Washington Post	Oct 27-30	388 (A)	±6%	67%	30%	3%
FOX News	Oct 27-30	388 (A)	±6%	78%	15%	7%
FOX News	Oct 6-8	367-376(LV)	±6%	77%	17%	6%
Morning Consult	Jun 29 – Jul 1	483	± 4.0%	83%	15%	3%
Morning Consult	Jun 29 – Jul 1	541	± 4.0%	83%	15%	2%
Morning Consult	Jun 21–24	698	± 4.0%	87%	12%	1%
Morning Consult	Jun 20–23	639	± 4.0%	87%	10%	3%
Morning Consult	Jun 14–16	693	± 4.0%	86%	13%	2%
Morning Consult	Jun 7–9	659	± 4.0%	84%	13%	3%
Morning Consult	May 31 – Jun 2	672	± 4.0%	83%	14%	3%
Change Research	May 18–21	1,248	± 2.8%	95%	4%	–
Morning Consult	May 10–12	695	± 4.0%	84%	15%	3%
Morning Consult	May 3–6	680	± 4.0%	85%	13%	2%
Morning Consult	Apr 28–29	692	± 4.0%	84%	13%	2%
Morning Consult	Apr 19–21	641	± 4.0%	79%	18%	4%
Morning Consult	Apr 12–14	367	–	83%	15%	2%
Morning Consult	Apr 12–14	358	–	82%	15%	3%
Morning Consult	Apr 1–7	11,986	± 1.0%	76%	20%	–
Morning Consult	Mar 25–31	11,549	± 1.0%	78%	20%	–
Morning Consult	Mar 18–24	12,090	± 1.0%	77%	19%	–
Morning Consult	Mar 11–17	11,542	± 1.0%	78%	20%	–
Morning Consult	Mar 4–10	13,682	± 1.0%	77%	20%	–
Morning Consult	Feb 25 – Mar 3	11,154	± 1.0%	77%	20%	–
Morning Consult	Feb 18–24	13,782	± 1.0%	77%	20%	–
Morning Consult	Feb 11–17	13,974	± 1.0%	77%	21%	–
Morning Consult	Feb 4–10	10,685	± 1.0%	77%	20%	–
	2019
Public Religion Research Institute	Sep 17 – Oct 1	927	–	66%	33%	1%
Saint Leo University	May 25–31	–	–	63%	24%	13%
USC Dornsife/LAT	Dec 15 – Jan 15	1,530	± 3.0%	75%	25%	–
Emerson College	Jan 8–11	198	–	68%	18%	14%
	2018
Public Policy Polling	Dec 11–12	–	–	70%	24%	6%
Public Religion Research Institute	Oct 18–30	846	–	59%	34%	7%
Public Policy Polling	Oct 27–29	–	–	57%	36%	8%
Public Policy Polling	Sep 22–25	–	–	61%	27%	12%
Public Policy Polling	Aug 18–21	–	–	57%	29%	13%

Statewide polling

The statewide polls are ordered by the scheduled date of the state's primary or caucus. Polls with a sample size of <100 have their 'sample size' cells marked in red to indicate a lack of reliability.

Iowa caucus

The Iowa Republican caucus will take place on Monday, February 3, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Michael Bloomberg	John Kasich	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
Emerson Colllege	Oct 13–16, 2019	286	–	–	–	93%	2%	4%	1%^{[lower-alpha 19]}	–
	Aug 25	Walsh announces his candidacy
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Mar 21–24, 2019	207	± 6.9%	8%	–	93%	–	–	–	–
Emerson College	Mar 21–24, 2019	207	± 6.9%	–	–	90%	–	10%	–	–
Emerson College	Jan 30 – Feb 2, 2019	280	–	–	10%	90%	–	–	–	–

New Hampshire primary

The New Hampshire Republican primary will take place on Tuesday, February 11, 2020.^[1]

Polling Aggregation
Source of poll aggregation	Date Updated	Dates polled	Donald Trump	Bill Weld	Joe Walsh	Undecided^{[lower-alpha 20]}
270 to Win	Dec 11, 2019	Nov 26 - Dec 11, 2019	79.0%	11.0%	3.5%	6.5%

Since July 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
RKM Research and Communications Inc./Boston Herald/FPU/NBC10	Jan 8-12, 2020	402 (LV)	–	79%	4%	4%	5%^{[lower-alpha 21]}	8%
MassINC Polling Group/WBUR	Dec 3-8, 2019	365 (LV)	± 5.1%	74%	4%	9%	9%^{[lower-alpha 22]}	4%^{[lower-alpha 23]}
Emerson College	Nov 22-26, 2019	440 (LV)	–	84%	3%	13%	0%	–
University of New Hampshire/CNN	Oct 21–27, 2019	461 (LV)	± 4.6%	86%	1%	5%	4%^{[lower-alpha 24]}	4%
RKM Research and Communications Inc./Boston Herald/FPU	Oct 9–13, 2019	405	± 4.9%	71%	5%	14%	3%^{[lower-alpha 25]}	7%
RKM Research and Communications Inc./Franklin Pierce University/Boston Herald	Sep 4–10, 2019	414	–	88%	1%	3%	1%	7%
Emerson College	Sep 6–9, 2019	379	–	80%	7%	13%	–	–
	Aug 25	Walsh announces his candidacy
University of New Hampshire Survey Center/CNN	Jul 8-15, 2019	289 (LV)	± 5.8%	86%	–	7%	2%	5%

Before July 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Tom Cotton	Ted Cruz	Jeff Flake	Larry Hogan	John Kasich	Mike Pence	Mitt Romney	Marco Rubio	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
Monmouth University	May 2–7, 2019	427	± 4.8%	–	–	–	–	–	–	–	–	72%	–	12%	1%	2%
Suffolk University	Apr 25–28, 2019	394	± 4.9%	–	–	–	0%	9%	–	–	–	70%	–	8%	–	12%
Suffolk University	Apr 25–28, 2019	394	± 4.9%	–	–	–	–	–	–	–	–	72%	–	17%	–	10%
University of New Hampshire	Apr 10–18, 2019	208	± 6.8%	–	–	–	1%	10%	–	–	–	76%	–	5%	–	8%
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
University of New Hampshire	Feb 18–26, 2019	218	± 6.6%	–	–	–	–	17%	–	–	–	68%	–	3%	–	12%
Emerson College	Feb 21–22, 2019	328	± 5.4%	–	–	–	–	–	–	–	–	82%	–	18%	–	–
Praecones Analytica	Jan 16–21, 2019	330	–	–	–	–	–	–	–	24%	–	70%	–	–	–	6%
Suffolk University	Apr 26–30, 2018	315	± 5.5%	–	–	15%	–	–	–	–	–	72%	–	–	–	13%
				–	–	–	–	23%	–	–	–	68%	–	–	–	8%
				–	–	–	–	–	–	28%	–	63%	–	–	–	9%
				–	–	–	–	–	–	–	23%	66%	–	–	–	11%
University of New Hampshire	Apr 13–22, 2018	202	± 6.8%	–	–	–	–	19%	–	–	–	67%	–	–	0%	14%
American Research Group	Mar 21–27, 2018	420	± 5.0%	–	–	4%	–	34%	–	–	–	51%	–	–	–	11%
				–	–	33%	–	–	–	–	–	49%	–	–	–	18%
				–	–	–	–	42%	–	–	–	48%	–	–	–	9%
				5%	7%	11%	–	36%	–	–	–	–	–	–	–	41%
American Research Group	Aug 4–6, 2017	600	± 4.0%	–	–	–	–	52%	–	–	–	40%	–	–	–	8%
American Research Group	Aug 4–6, 2017	600	± 4.0%	–	–	–	–	52%	27%	–	–	–	–	–	–	32%

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Other	Undecided
University of New Hampshire	Apr 10–18, 2019	208	± 6.8%	63%	14%	23%
University of New Hampshire	Feb 18–26, 2019	218	± 6.6%	56%	15%	29%
University of New Hampshire	Aug 2–19, 2018	199	± 6.9%	56%	20%	24%
University of New Hampshire	Apr 13–22, 2018	202	± 6.8%	55%	19%	27%
University of New Hampshire	Jan 28 – Feb 10, 2018	157	± 7.8%	60%	18%	23%
University of New Hampshire	Oct 3–15, 2017	191	± 7.1%	47%	23%	30%

Nevada caucus

The Nevada caucus was cancelled by the Nevada Republican Party in a vote on September 7, 2019.^[2]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
Emerson College	Oct 31–Nov 3, 2019	409 (LV)	–	2%	92%	3%	3%	–
	Sep 8	Sanford announces his candidacy
	Sep 7	The Nevada Republican Party votes to cancel their caucus.
	Aug 25	Walsh announces his candidacy
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Mar 28–30, 2019	263	± 6.1%	–	92%	–	8%	–

South Carolina primary

The South Carolina primary was cancelled in a vote by the South Carolina Republican Party on September 7, 2019.^[2]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Bob Corker	Jeff Flake	Nikki Haley	John Kasich	Mark Sanford	Donald Trump	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
	Sep 8	Sanford announces his candidacy
	Sep 7	The South Carolina Republican Party votes to cancel their primary.
Change Research [2]	Aug 9–12, 2019	568 (LV)	± 4.3%	–	–	14%	–	–	79%	–	–
Change Research [2]	Aug 9–12, 2019	568 (LV)	± 4.3%	–	–	–	–	2%	95%	–	–
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Feb 28 – Mar 2, 2019	380	± 5.1%	–	–	–	–		90%	10%	–
Change Research	Feb 15–18, 2019	720	–	2%	–	–	–		91%	–	8%
				–	2%	–	–		93%	–	5%
				–	–	21%	–		67%	–	11%
				–	–	–	3%		91%	–	6%
				–	–	–	–		90%	3%	7%

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Other	Undecided
Change Research	Jun 11–14, 2019	1,183	± 2.9%	95%	5%	–

California primary

The California Republican primary will take place on Tuesday, March 3, 2020.^[1]

Since June 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Bill Weld	Joe Walsh	Other	Undecided
CNN/SSRS	Dec 4-8, 2019	298 (LV)	± 6.7%	–	85%	3%	3%	2%^{[lower-alpha 26]}	8%
	Nov 12	Sanford withdraws from the race
Emerson College	Sep 13–18, 2019	208 (LV)	–	6%	86%	4%	–	4%	-
	Sep 8	Sanford announces his candidacy
	Aug 25	Walsh announces his candidacy

April 2019 to May 2019

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Nikki Haley	John Kasich	Donald Trump	Bill Weld	Undecided
Change Research	May 25–28, 2019	989	± 3.1%	5%	–	86%	–	8%
				–	3%	90%	–	7%
				–	–	91%	3%	6%
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Change Research	Apr 6–9, 2019	853	–	5%	–	83%	–	12%
Change Research	Apr 6–9, 2019	853	–	–	4%	83%	–	14%

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Other	Undecided
Change Research	May 25–28, 2019	989	± 3.1%	94%	7%	–
Change Research	Apr 6–9, 2019	853	–	88%	12%	–

Colorado primary

The Colorado Republican primary will take place on Tuesday, March 3, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Bill Weld	Undecided
Emerson College	Aug 16–19, 2019	339	± 5.3%	86%	14%	–
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Other	Undecided
Magellan Strategies	Jan 30–31 and Feb 4, 2019	622	± 3.9%	78%	17%	5%

Massachusetts primary

The Massachusetts Republican primary will take place on Tuesday, March 3, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Charlie Baker	Jeff Flake	John Kasich	Mike Pence	Mitt Romney	Paul Ryan	Donald Trump	Bill Weld	Undecided
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Apr 4–7, 2019	183	± 7.2%	–	–	–	–	–	–	82%	18%	–
YouGov/UMass Amherst	Nov 7–14, 2018	227	–	30%	1%	3%	–	7%	2%	40%	–	16%
YouGov/UMass Amherst	Nov 7–14, 2018	225	–	33%	1%	7%	26%	8%	2%	–	–	22%

North Carolina primary

The North Carolina Republican primary will take place on Tuesday, March 3, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Bill Weld	Undecided
Emerson College	May 31 – Jun 3, 2019	336	–	88%	12%	–

Texas primary

The Texas Republican primary will take place on Tuesday, March 10, 2020.^[1]

Polling Aggregation
Source of poll aggregation	Date Updated	Dates polled	Donald Trump	Mark Sanford	Joe Walsh	Bill Weld	Undecided^{[lower-alpha 27]}
270 to Win	Nov 24, 2019	Nov 18, 2019	78.0%	4.0%	1.0%	1.0%	13.0%

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
CNN/SSRS	Dec 4-8. 2019	537 (LV)	± 5%	–	86%	4%	3%	2%^{[lower-alpha 28]}	4%
University of Texas at Tyler	Nov 5–14, 2019	597 (RV)	-	4%	78%	1%	1%	–	–
	Nov 12	Sanford withdraws from the race
	Sep 8	Sanford announces his candidacy
	Aug 25	Walsh announces his candidacy
Emerson College	Aug 1–3, 2019	482	–	–	90%	–	10%	–	–
Emerson College	Apr 25–28, 2019	344	± 5.3%	–	87%	–	13%	–	–

Utah primary

The Utah Republican primary will take place on Tuesday, March 3, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Mitt Romney	Undecided
OH Predictive Insights	Mar 15–27, 2019	275	± 5.9%	37%	55%	8%

Wyoming caucuses

The last presidential cycle's Wyoming caucuses took place on March 1 in 2016 and would, if scheduled for Super Tuesday in 2020, take place on March 3, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
Montana State University Billings	Oct 7-16, 2019	67 (LV)	–	No voters	91%	<1%	<1%	8%

Michigan primary

The Michigan Republican primary will take place on Tuesday, March 10, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
Emerson College	Oct 31–Nov 3, 2019			2%	92%	3%	3%	-
	Sep 8	Sanford announces his candidacy
	Aug 25	Walsh announces his candidacy
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Mar 7–10, 2019	306	± 5.6%	-	89%	-	11%	–

Ohio primary

The Ohio Republican primary will take place on Tuesday, March 10, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	John Kasich	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
Emerson College	Sep 29–Oct 2, 2019	325 (LV)		-	2%	87%	5%	5%	-
	Sep 8	Sanford announces his candidacy
	Aug 25	Walsh announces his candidacy
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Baldwin Wallace University	Feb 28 – Mar 9, 2018	261	± 6.0%	27%	-	62%	-	-	–

Florida primary

The Florida Republican primary will take place on Tuesday, March 17, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Larry Hogan	John Kasich	Mark Sanford	Donald Trump	Marco Rubio	Joe Walsh	Bill Weld	Undecided
Florida Atlantic University	Jan 9-12, 2020	488 (LV)	± 4.4%	–	–	–	80%	–	14%	5%	–
	Nov 12	Sanford withdraws from the race
Florida Atlantic University	Sep 12–15, 2019	355	± 5.2%	–	–	8%	85%	–	5%	2%	–
	Sep 8	Sanford announces his candidacy
	Aug 25	Walsh announces his candidacy
Florida Atlantic University	May 16–19, 2019	394	± 4.9%	0%	2%	–	85%	5%	–	1%	7%
	Apr 15, 2019	Weld announces his candidacy (exploratory committee on Feb 15, 2019)

Against unnamed primary challenger

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Other	Undecided
Saint Leo University	May 25–31, 2018	–	–	68%	18%	13%

Wisconsin primary

The Wisconsin Republican primary will take place on Tuesday, April 7, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Bill Weld	Undecided
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Mar 15–17, 2019	293	–	89%	11%	–

Arizona primary

The Arizona 2016 Republican primary was held on March 22, 2016, but the 2020 primary was cancelled on September 9, 2019.^[3]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Other	Undecided
	Nov 12	Sanford withdraws from the race
Emerson College	Oct 25-28, 2019	367 (LV)	–	5%	88%	3%	4%	–	–
	Sep 9	The Arizona Republican Party votes to cancel their primary.

Delaware primary

The Delaware Republican primary will take place on Tuesday, April 28, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	John Kasich	Donald Trump	Undecided
Gravis Marketing	Jul 24–29, 2018	288	± 5.8%	9%	67%	25%

Maryland primary

The Maryland Republican primary will take place on Tuesday, April 28, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Larry Hogan	Donald Trump	Undecided
Gonzales Research	Apr 29 – May 4, 2019	203	± 7.0%	24%	68%	8%

Pennsylvania primary

The Pennsylvania Republican primary will take place on Tuesday, April 28, 2020.^[1]

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Bill Weld	Undecided
	Apr 15	Weld announces his candidacy (exploratory committee on Feb 15, 2019)
Emerson College	Mar 26–28, 2019	311	± 5.5%	90%	10%	–

Montana primary

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Mark Sanford	Donald Trump	Joe Walsh	Bill Weld	Undecided
	Nov 12	Sanford withdraws from the race
Montana State University Billings	Oct 7-16, 2019	99 (LV)	–	1%	88%	No voters	No voters	11%

New Jersey primary

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Joe Walsh	Bill Weld	Undecided
Emerson College	Jan 16-19, 2020	197 (LV)	± 6.9%	93%	4%	4%	–

New Mexico primary

Poll source	Date(s) administered	Sample size^{[lower-alpha 2]}	Margin of error	Donald Trump	Joe Walsh	Bill Weld	Undecided
Emerson College	Jan 3-6, 2020	322 (LV)	–	87%	8%	5%	–

Notes

↑ Calculated by taking the difference of 100% and all other candidates combined
↑ ^2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 ^2.11 ^2.12 ^2.13 ^2.14 ^2.15 ^2.16 ^2.17 ^2.18 ^2.19 ^2.20 ^2.21 ^2.22 ^2.23 ^2.24 ^2.25 ^2.26 ^2.27 ^2.28 ^2.29 ^2.30 ^2.31 ^2.32 ^2.33 Key:
A – all adults
RV – registered voters
LV – likely voters
V – unclear
↑ would not vote with 1%
↑ would not vote with 1%
↑ would not vote with 1%
↑ would not vote with 0%
↑ No voters
↑ would not vote with 0%
↑ Refused with 0%
↑ Would not vote with 1%
↑ Would not vote with 1%
↑ Would not vote with 1%
↑ Would not vote with 1%
↑ Would not vote with 1%
↑ Would not vote with 1%
↑ Romney with 9%
↑ Kasich with 5%; can't/won't vote with 1%; other with 2%
↑ Includes "refused"
↑ Sanford with 1%
↑ Calculated by taking the difference of 100% and all other candidates combined
↑ Rocky de la Fuente with 2%; other with 3%
↑ Some other candidate with 4%; would not vote with 5%
↑ Includes "refused"
↑ Sanford with 1%; other with 3%
↑ Sanford with 1%; other with 2%
↑ Someone else with 1%, "no one" with 1%
↑ Calculated by taking the difference of 100% and all other candidates combined
↑ Someone else with 1%; "no one" with 1%

References

↑ ^1.00 ^1.01 ^1.02 ^1.03 ^1.04 ^1.05 ^1.06 ^1.07 ^1.08 ^1.09 ^1.10 ^1.11 ^1.12 ^1.13 ^1.14 ^1.15 Lua error in package.lua at line 80: module 'strict' not found.
↑ ^2.0 ^2.1 Lua error in package.lua at line 80: module 'strict' not found.
↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

Primary poll tracker from FiveThirtyEight

[1] Calculated by taking the difference of 100% and all other candidates combined

[fn1-2] 2.00 ^2.01 ^2.02 ^2.03 ^2.04 ^2.05 ^2.06 ^2.07 ^2.08 ^2.09 ^2.10 ^2.11 ^2.12 ^2.13 ^2.14 ^2.15 ^2.16 ^2.17 ^2.18 ^2.19 ^2.20 ^2.21 ^2.22 ^2.23 ^2.24 ^2.25 ^2.26 ^2.27 ^2.28 ^2.29 ^2.30 ^2.31 ^2.32 ^2.33 Key:
A – all adults
RV – registered voters
LV – likely voters
V – unclear

[3] would not vote with 1%

[4] would not vote with 1%

[5] would not vote with 1%

[6] would not vote with 0%

[7] No voters

[8] would not vote with 0%

[9] Refused with 0%

[10] Would not vote with 1%

[11] Would not vote with 1%

[12] Would not vote with 1%

[13] Would not vote with 1%

[14] Would not vote with 1%

[15] Would not vote with 1%

[16] Romney with 9%

[17] Kasich with 5%; can't/won't vote with 1%; other with 2%

[18] Includes "refused"

[20] Sanford with 1%

[21] Calculated by taking the difference of 100% and all other candidates combined

[22] Rocky de la Fuente with 2%; other with 3%

[23] Some other candidate with 4%; would not vote with 5%

[24] Includes "refused"

[25] Sanford with 1%; other with 3%

[26] Sanford with 1%; other with 2%

[28] Someone else with 1%, "no one" with 1%

[29] Calculated by taking the difference of 100% and all other candidates combined

[30] Someone else with 1%; "no one" with 1%

[FHQ-primarydates-19] 1.00 ^1.01 ^1.02 ^1.03 ^1.04 ^1.05 ^1.06 ^1.07 ^1.08 ^1.09 ^1.10 ^1.11 ^1.12 ^1.13 ^1.14 ^1.15 Lua error in package.lua at line 80: module 'strict' not found.

[primarycancellation-27] 2.0 ^2.1 Lua error in package.lua at line 80: module 'strict' not found.

[31] Lua error in package.lua at line 80: module 'strict' not found.

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