Poll Update

2016 Iowa President - Clinton 41%, Trump 37% (NBC News/Wall Street Journal/Marist College 8/3-8/7/16)

Population 1,023 Adults
Margin of Error ±3.1 percentage points
Polling Method Live Phone
Source NBC/WSJ/Marist
This poll asked respondents 4 questions tracked by HuffPost Pollster. Read our FAQ.

If November's presidential election were held today, whom would you support if the candidates are:

Asked of 899 Registered Voters
Hillary Clinton and Tim Kaine, the Democrats 41%
Donald Trump and Mike Pence, the Republicans 37%
Neither 11%
Other 2%
Undecided 9%

If November's presidential election were held today, whom would you support if the candidates are:

Asked of 899 Registered Voters
Hillary Clinton, the Democrat 35%
Donald Trump, the Republican 35%
Gary Johnson, the Libertarian 12%
Jill Stein, the Green Party 6%
Other 2%
Undecided 10%

Do you approve or disapprove of the job Barack Obama is doing as president?

Asked of 1023 Adults
Approve 46%
Disapprove 41%
Unsure 13%

2016 Iowa election for U.S. Senate including those who are undecided yet leaning toward a candidate

Asked of 899 Registered Voters
Chuck Grassley, the Republican I 52%
Patty Judge, the Democrat 42%
Other 1%
Undecided 5%