It’s no accident that John McCain was in Pennsylvania on Tuesday. The state and its 21 electoral votes have become an absolute must-win for the G.O.P. nominee, now that his campaign has all but conceded Michigan, Wisconsin, Maine, New Hampshire, Iowa and Colorado to Barack Obama.
Pennsylvania is now the only blue state on the board that McCain’s campaign seems serious about trying to win. Doing so would create a net swing of 42 electoral votes, which at least theoretically would make McCain competitive on election night – although even then it probably wouldn’t matter, with Obama poised to pick off at least a few sizable red states.
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