Poll Chart

2016 Iowa Senate: Grassley vs. Judge

Currently tracking 23 polls from 13 pollsters
Updated 25 days 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.)

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Latest Polls

Poll
Grassley
Judge
Other
Undecided
Spread
Nov 1 – Nov 7
1,781 Likely Voters
57 39 4 Grassley +18
Nov 1 – Nov 4
800 Likely Voters
56 33 2 10 Grassley +23
Nov 1 – Nov 3
500 Likely Voters
53 37 1 8 Grassley +16
Oct 25 – Oct 31
984 Likely Voters
56 41 3 Grassley +15
Oct 20 – Oct 26
791 Likely Voters
56 38 0 5 Grassley +18
Oct 8 – Oct 16
1,135 Likely Voters
56 40 5 Grassley +16
Oct 7 – Oct 10
917 Likely Voters
51 39 11 Grassley +12
Oct 3 – Oct 6
642 Likely Voters
53 36 2 9 Grassley +17
Sep 20 – Sep 22
491 Likely Voters
54 37 1 9 Grassley +17
Sep 13 – Sep 21
612 Likely Voters
55 43 0 2 Grassley +12
Sep 12 – Sep 14
404 Likely Voters
56 39 2 3 Grassley +17
Sep 6 – Sep 8
1,054 Likely Voters
50 37 13 Grassley +13
Aug 30 – Aug 31
827 Likely Voters
49 43 8 Grassley +6
Aug 17 – Aug 19
987 Likely Voters
45 38 1 15 Grassley +7
Aug 9 – Aug 16
846 Likely Voters
51 42 0 6 Grassley +9
Aug 8 – Aug 10
500 Likely Voters
52 42 6 Grassley +10
Aug 3 – Aug 7
899 Registered Voters
52 42 1 5 Grassley +10
Jul 13 – Jul 15
998 Likely Voters
45 37 2 16 Grassley +8
Jul 8 – Jul 11
401 Likely Voters
52 42 6 Grassley +10
Jul 5 – Jul 10
822 Registered Voters
52 42 1 5 Grassley +10
Jun 24 – Jun 28
600 Likely Voters
46 45 10 Grassley +1
Jun 22 – Jun 23
897 Likely Voters
46 39 14 Grassley +7
Jun 9 – Jun 13
630 Likely Voters
48 41 11 Grassley +7

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