Temper, temper. Republican John McCain is known for his. He's been dubbed "Senator Hothead" by more than one publication, but he's also had some success extracting his hatchet from several foreheads. Even his Republican Senate colleagues are not spared his sharp tongue. "F--- you," he shouted at Texas Sen. John Cornyn last year. "Only an a------ would put together a budget like this," he told the former Budget Committee chairman, Sen. Pete Domenici, in 1999. "I'm calling you a f------ jerk!" he once retorted to Iowa Sen. Chuck Grassley. With Cornyn, he smoothed things over quickly. The two argued during...