Rasmussen Reports : date : Mar 31, 2008 | Hillary Clinton : democrat_% : 36 | [TABLECONTEXT] : [title] : Opinion polling by state for the United States presidential election, 2008 (Iowa) | John McCain : republican_% : 51 | [TABLECONTEXT] : poll_source : Rasmussen Reports | Rasmussen Reports : republican : John McCain | Rasmussen Reports : democrat : Hillary Clinton | Rasmussen Reports : sample_size : 500
Rasmussen Reports polled 500 people in Iowa on March 31, 2008 with 36% in favor of Hillary Clinton and 51% for John McCain.