This isn't the first time he's caved on this issue. (Read this; it will shock the hell out of you.) But it's a particularly craven sell-out, inasmuch as McCain is simply trying to curry favor among the knuckle-dragging Neanderthals who comprise the pro-torture "base" of the Republican Party, people who have no idea what this country is about and, moreover, don't give a damn. McCain wants to be a hero to these lowlifes. That's why he is betraying his own deepest principles.
Gee, John, maybe Ann Coulter will like you now.