DISILLUSIONED supporters of President George W Bush are defecting to Barack Obama, the Democratic senator for Illinois, as the White House candidate with the best chance of uniting a divided nation. Tom Bernstein went to Yale University with Bush and co-owned the Texas Rangers baseball team with him. In 2004 he donated the maximum $2,000 to the president’s reelection campaign and gave $50,000 to the Republican National Committee. This year he is switching his support to Obama. He is one of many former Bush admirers who find the Democrat newcomer appealing. Matthew Dowd, Bush’s chief campaign strategist in 2004, announced...