COLUMBIA, S.C. - Democratic presidential hopeful Barack Obama has moved a campaign rally with talk show host Oprah Winfrey to a football stadium that can hold more than 80,000 people. ADVERTISEMENT The event had been scheduled for an 18,000-seat coliseum near the University of South Carolina campus, but the campaign ran out of the free tickets just two days after it began distributing them. Tickets will no longer be needed. "We wanted to make sure everyone in South Carolina who wanted to see Barack Obama and meet Oprah Winfrey had the opportunity," said Inez Tenenbaum, an Obama supporter and former...