. "Iowa has switched its support in each of the past three elections, supporting Obama in 2008, Republican President George W. Bush in 2004 and Democrat Al Gore in 2000.Trying to build on his 2008 win there, Obama's campaign has opened eight offices in the state and had held more than 1,200 training sessions, phone banks and other events and made more than 350,000 phone calls to supporters since Apri" . . . .