WASHINGTON -- Sen. John McCain, R-Ariz., is considered a front-runner for the 2008 race, but does McCain have the temperament to be president? As portrayed by the mainstream media, McCain is an engaging war hero, a man of political moderation positioned between the left and the right. But to insiders who know him, McCain has an irrational, explosive side that make many of them question whether he is fit to serve as president and be commander in chief. Nowhere is that sentiment stronger than in the Senate, where McCain has few friends or supporters. In fact, when McCain ran for...