Clinton: Pennsylvania a bellwether of race

Hillary Clinton's campaign just responded this afternoon with its pre-results spin memo, pressing the argument that if Barack Obama really didn't hold out much hope of winning Pennsylvania, he wouldn't have spent so much time and money.

"Sen. Obama's supporters -- and many pundits -- have argued that the delegate 'math' makes him the prohibitive frontrunner. They have argued that Sen. Clinton's chances are slim to none. So if he's already the frontrunner, if he's had six weeks of unlimited resources to get his message out, shouldn't he be the one expected to win tonight? If not, why not?" the memo asks.

Clinton's camp also calls Pennsylvania a bellwether state and argues that the nomination race is basically tied, though Obama leads in delegates, popular vote, and contests won.

"As the phrase goes, watch what they do not what they say," the memo continues. "There's a reason Sen. Obama and his campaign have ratcheted up their year-long assault on Sen. Clinton's character and ended the Pennsylvania campaign with a flurry of harsh negative attacks. It's because they know that a loss in Pennsylvania will raise troubling questions about his candidacy and his ability to take on John McCain in the general election. And it's because they know that the race is neck and neck and tonight's contest is a measure of where the campaign stands."