Hollywood superstar George Clooney has thrown his support behind US presidential candidate BARACK OBAMA, and has even offered to campaign for the Illinois senator. Staunch Democrat Clooney is excited by Obama's "true rock star" presence and hopes he can win at the 2008 presidential elections. Clooney says, "I've never been around anybody who walks into a room and everyone just stops and listens to him. "He's magnetic and charismatic in a way that we haven't had for a long time. I would certainly go out and fundraise for him."