McCain ain't able?

"'The campaign is imploding,' said one McCain staffer, echoing a word used by others." With his campaign leadership resigning en masse, some serious funding problems looming on the horizon, and a possible mobile phone slip-up that might prove illegal, is John McCain's 2008 bid already derailed? Slate's John Dickinson surveys the wreckage. "Those who remain are trying to argue that McCain is showing leadership by holding his top brass accountable, but the episode looks more like the last scene in Hamlet -- a stack of bodies piled up just before the curtain." Update: McCain circles the wagons.