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Iowa US Senate

Incumbent: Chuck Grassley (R) | 2 candidates | Election on November 8, 201620 polls

SampleGrassley (R)Judge (D)
IA: Emerson College
Nov 1-3, 2016
391 of 700
Likely | 55.86%
58.31%
228
32.74%
128
IA: Loras College
Nov 1-3, 2016
261 of 500
Likely | 52.2%
51.72%
135
37.55%
98
IA: Quinnipiac University
Oct 20-26, 2016
403.41 of 791
Likely | 51%
50%43%
IA: Quinnipiac University
Sep 13-21, 2016
318.24 of 612
Likely | 52%
49%49%
IA: Monmouth University Polling Institute
Sep 12-14, 2016
206.04 of 404
Likely | 51%
47%48%
IA: RABA Research, Simpson College
Sep 6-8, 2016
558.62 of 1054
Registered | 53%
46%38%
IA: Emerson College
8/31-9/1/2016
321 of 600
Likely | 53.5%
44.86%
144
46.11%
148
IA: YouGov, CBS News
Aug 17-19, 2016
520 of 987
Likely | 52.68%
42%38%
IA: Quinnipiac University
Aug 9-16, 2016
448.38 of 846
Likely | 53%
46%47%
IA: Suffolk University
Aug 8-10, 2016
266 of 500
Likely | 53.2%
46.62%
124
46.24%
123
IA: Marist Institute for Public Opinion, NBC News, Wall Street Journal
Aug 3-7, 2016
467.48 of 899
Registered | 52%
41%52%
IA: YouGov, CBS News
Jul 13-15, 2016
524 of 998
Likely | 52.51%
40%38%
IA: Marist Institute for Public Opinion, NBC News, Wall Street Journal
Jul 5-10, 2016
443.88 of 822
Registered | 54%
51%45%
IA: Loras College
Jun 24-28, 2016
318 of 600
Likely | 53%
43.71%
139
45.91%
146
IA: Public Policy Polling, Americans United For Change
Jun 22-23, 2016
475.41 of 897
Registered | 53%
39%44%
IA: Public Policy Polling
Jun 9-10, 2016
333.9 of 630
Registered | 53%
44%48%

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