Trump looked out Friday night at thousands of Oklahomans, many in Trump T-shirts and caps, waving Trump signs and screaming his name. Some camped out for a couple hours at the band shell, sitting through a performance by a cover band with a faulty sound system, just so they could see him up close. "At first, when he said he was going to run, I thought it was a joke," said Charlie Bevers, 62, a supporter and retired social studies teacher who lives in the Oklahoma City suburbs. "When he got out there and did his 'Trumpisms,' I listened because...