Poll Chart

2016 Iowa Senate: Grassley vs. Judge

Currently tracking 23 polls from 13 pollsters

Updated over 1 year ago

Election on November 8, 2016

This chart combines the latest opinion polls into trendlines using a poll-tracking model and is updated whenever a new poll is released.

HuffPost Model

Our model of the polls suggests Grassley was very likely leading. (In >99% of simulations, Grassley led Judge.)

Choices

Click a choice to show or hide it on the chart.

Grassley53.2% incumbent
Judge37.0%
Undecided7.8%
Other2.1%

View HuffPost's Senate forecast

Latest Polls

Poll	Grassley	Judge	Other	Undecided	Spread
SurveyMonkey Nov 1 – Nov 7, 2016 1,781 Likely Voters	57	39		4	Grassley +18
Des Moines Register/Mediacom/Selzer Nov 1 – Nov 4, 2016 800 Likely Voters	56	33	2	10	Grassley +23
Loras College Nov 1 – Nov 3, 2016 500 Likely Voters	53	37	1	8	Grassley +16
SurveyMonkey Oct 25 – Oct 31, 2016 984 Likely Voters	56	41		3	Grassley +15
Quinnipiac Oct 20 – Oct 26, 2016 791 Likely Voters	56	38	0	5	Grassley +18
WashPost/SurveyMonkey Oct 8 – Oct 16, 2016 1,135 Likely Voters	56	40		5	Grassley +16
Lucid/The Times-Picayune Oct 7 – Oct 10, 2016 917 Likely Voters	51	39		11	Grassley +12
Des Moines Register/Mediacom/Selzer Oct 3 – Oct 6, 2016 642 Likely Voters	53	36	2	9	Grassley +17
Loras College Sep 20 – Sep 22, 2016 491 Likely Voters	54	37	1	9	Grassley +17
Quinnipiac Sep 13 – Sep 21, 2016 612 Likely Voters	55	43	0	2	Grassley +12
Monmouth University Sep 12 – Sep 14, 2016 404 Likely Voters	56	39	2	3	Grassley +17
RABA Research/Simpson Sep 6 – Sep 8, 2016 1,054 Likely Voters	50	37		13	Grassley +13
PPP (D-Constitutional Responsibility Project) Aug 30 – Aug 31, 2016 827 Likely Voters	49	43		8	Grassley +6
CBS/YouGov Aug 17 – Aug 19, 2016 987 Likely Voters	45	38	1	15	Grassley +7
Quinnipiac Aug 9 – Aug 16, 2016 846 Likely Voters	51	42	0	6	Grassley +9
Suffolk Aug 8 – Aug 10, 2016 500 Likely Voters	52	42		6	Grassley +10
NBC/WSJ/Marist Aug 3 – Aug 7, 2016 899 Registered Voters	52	42	1	5	Grassley +10
CBS/YouGov Jul 13 – Jul 15, 2016 998 Likely Voters	45	37	2	16	Grassley +8
Monmouth University Jul 8 – Jul 11, 2016 401 Likely Voters	52	42		6	Grassley +10
NBC/WSJ/Marist Jul 5 – Jul 10, 2016 822 Registered Voters	52	42	1	5	Grassley +10
Loras College Jun 24 – Jun 28, 2016 600 Likely Voters	46	45		10	Grassley +1
PPP (D-Americans United for Change/Constitutional Responsibility Project) Jun 22 – Jun 23, 2016 897 Likely Voters	46	39		14	Grassley +7
PPP (D-Constitutional Responsibility Project) Jun 9 – Jun 13, 2016 630 Likely Voters	48	41		11	Grassley +7