COLUMBIA, SC -- Oprah Winfrey took the stage at William Bryce Football Stadium to deafening cheers. Over 29,000 people filled the risers, some having driven from as far as Savannah, GA, to see her appear with Barack Obama. At what was the third campaign stop Oprah has made with Obama this weekend, she praised him as an "evolved leader," pinning her desire to support Obama on his ability to inspire people. "For the first time, I'm stepping out of my pew because I've been inspired. I've been inspired to believe that a new vision is possible for America. Dr King...