[TABLECONTEXT] : poll_source : Survey USA | Survey USA : date : Jan 4-6, 2008 | Barack Obama : democrat_% : 55 | [TABLECONTEXT] : [title] : Opinion polling by state for the United States presidential election, 2008 (Iowa) | Survey USA : democrat : Barack Obama | John McCain : republican_% : 38 | Survey USA : republican : John McCain
Barack Obama had 55% support against John McCain's 38% in the Jan 4-6 2008 poll conducted by Survey USA in Iowa.