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BARACK OBAMA

She can sell millions of books, launch careers, and fill an entire network with new shows – but can Winfrey pick the president? Some say yes. Before Barack Obama even decided to run for President, Winfrey threw her support behind the junior Senator – and stumped for him in her "Oprah-bama" tour in 2007. "If he wants me to, I'm ready to go door to door," Winfrey later tells Entertainment Tonight, after Obama beats former front-runner Hillary Clinton for the Democratic nomination.