In Donald Rumsfeld’s new book, he characterizes John McCain as having a “hair-trigger temper” with “a propensity to shift his positions to appeal to the media.”McCain has struck back saying how happy he is that Rumsfeld was ultimately forced out.Of course this does not change Rumsfeld’s characterization. McCain is, after all, the man who claimed for years to be a straight talking maverick who rode the “Straight Talk Express” to defeat in 2008. Until, that is, McCain met the tea party, at which point he proclaimed that he’d never been a maverick.Suddenly he is again. McCain blows with the wind and times. Donald Rumsfeld stays pretty consistently awesome.