File photo of Barack Obama in Iowa City

 
File photo of Barack Obama in Iowa City
U.S. President Barack Obama holds up books by Mitt Romney and Karl Rove as he shops for his daughters in Iowa City, in this March 25, 2010 file photo. Nearly a decade ago he was dubbed "Bush's Brain," for his influence in guiding Republican George W. Bush to the U.S. Presidency. This year, Karl Rove could be Mitt Romney's brawn. REUTERS/Jason Reed/Files (UNITED STATES - Tags: MEDIA POLITICS ELECTIONS)