2015 Other States Polls
Other States 2015
August 25, 2015: Iowa Democratic Presidential Caucus
Poll Documents
Press Release
Poll Shows Clinton Crushing Democratic Field in Iowa
Statement of Methodology
This survey of 500 likely Iowa Democratic Caucus voters was conducted between August 20 and August 24, 2015, and is based on a statewide random sample drawn from a list of registered Democratic voters who indicated they were very or somewhat likely to vote in their local Democratic Caucuses for president in six months. Each of Iowa's five areas and demographic information were determined from past contested Democratic presidential caucuses including 2008 and 2004, using a probability-proportionate-to-size method, which means that the phone numbers assigned to each county were proportional to the number of likely caucus voters. Iowa's 99 counties were grouped into five general regions. The margin of sampling error for results based on the total sample is plus or minus 4.4 percentage points. Error margins increase for smaller subgroups in the cross-tabulation document which follows. All surveys may be subject to other sources of error, including, but not limited to coverage error and measurement error.
Key Names/Issues
Hillary Clinton, Bernie Sanders, Joe Biden, Lincoln Chafee, Martin O'Malley, Jim Webb, Barack Obama, Tom Harkin, State Department email investigation, minimum wage
August 11, 2015: Iowa Republican Presidential Caucus
Poll Documents
Press Release
Trump Leads Iowa GOP Field but Shows Less Strength Among Debate Viewers
Statement of Methodology
This survey of 500 likely Iowa Republican Caucus voters was conducted between August 7 and August 10, 2015, and is based on a statewide random sample drawn from a list of registered Republican voters who indicated they were very or somewhat likely to vote in their local Republican Caucuses in six months. Each of Iowa's five areas and demographic information were determined from past contested Republican presidential caucuses including 2008 and 2012, using a probability-proportionate-to-size method, which means that the phone numbers assigned to each county were proportional to the number of likely caucus voters. Iowa's 99 counties were grouped into five general regions. The margin of sampling error for results based on the total sample is plus or minus 4.4 percentage points. Error margins increase for smaller subgroups in the cross-tabulation document which follows. All surveys may be subject to other sources of error, including, but not limited to coverage error and measurement error.
Key Names/Issues
Jeb Bush, Ben Carson, Chris Christie, Ted Cruz, Carly Fiorina, Jim Gilmore, Lindsey Graham, Mike Huckabee, Bobby Jindal, John Kasich, George Pataki, Rand Paul, Rick Perry, Marco Rubio, Rick Santorum, Donald Trump, Scott Walker, FoxNews debate