| − | | | + | |Mitt Romney leads Obama 47% to 44% as of September 2012.<ref>[http://www.rasmussenreports.com/public_content/politics/elections/election_2012/election_2012_presidential_election/iowa/election_2012_iowa_president Election 2012: Iowa President] rasmussenreports.com, retrieved September 21, 2012</ref> |