(CNN) - Talk show host and media mogul Oprah Winfrey told a crowd of nearly 30,000 gathered in Columbia, South Carolina Sunday that she was “stepping out” of her normal setting because she’d been “inspired” by Sen. Barack Obama, D-Illinois.
"I've never done this before," Winfrey told the crowd, as she introduced the Democratic White House hopeful. "I've never done it before because in the past I've been disappointed by politicians."
Watch Winfrey's entire 20-minute stadium address.
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– CNN Associate Producer Martina Stewart