Poll Update

2016 Iowa Democratic Presidential Caucus - Clinton 45%, Sanders 17% (Gravis Marketing 8/29-8/31/15)

Population 957 Registered Voters
Margin of Error ±3.2 percentage points
Polling Method Automated Phone
Source Gravis Marketing
This poll asked respondents 3 questions tracked by HuffPost Pollster. Read our FAQ.

2016 Iowa Democratic Presidential Caucus

Asked of 421 Likely Voters - Democrat
Clinton 45%
Sanders 17%
O'Malley 5%
Undecided 14%
Warren 13%
Biden 5%
Webb 1%
Chafee 1%

2016 Iowa Republican Presidential Caucus

Asked of 507 Likely Voters - Republican
Trump 32%
Cruz 7%
Rubio 6%
Carson 16%
Bush 4%
Kasich 1%
Christie 2%
Fiorina 5%
Paul 1%
Huckabee 3%
Santorum 1%
Undecided 11%
Pataki 0%
Graham 0%
Jindal 5%
Walker 6%
Perry 1%

Iowa: Obama Job Approval

Asked of 957 Registered Voters
Approve 43%
Disapprove 51%
Undecided 6%