Does McCain have a path to the presidency?

For John McCain, everything seems to hinge on Pennsylvania. If he wins that state, he has a real chance to win the White House. But if, as expected, Barack Obama wins it, then McCain has little or no hope.

The good news for McCain is that his campaign's efforts in the state appear to be paying off, at least to an extent. It's one place where we actually can say that the polls appear to be… » Full Story on Salon.com