EXIT POLLS: Negative Campaign Tarnishes Clinton, Obama  —  Preliminary Exit Polls Show Few Last-Minute Deciders in Pennsylvania Primary  —  Despite all the down-to-the-wire campaigning, preliminary exit poll results indicate that nearly eight in 10 Pennsylvania voters made up their minds …

On the Verge of a Stunner in Pennsylvania?  —  Hold on to your hats.  I've gotten the usual word of the exit poll results from one of my usual reliable sources.  He notes that Obama traditionally over-performs in the earliest exit polls, and that he expects the numbers to change as the night wears on - perhaps a reversal.

Dems Fight On; Clinton Wins PA Primary  —  Despite Delegate Lead, Obama Can't Seem To Lock Up Democratic Nomination  —  Sen. Hillary Clinton has won the Pennsylvania primary vote as expected, ABC News has projected.  —  Clinton has led polls in the state, and her win now fuels questions …

Clinton Outduels Obama in Primary  —  For better or worse — and many Democrats fear it is for worse — the race goes on.  —  Senator Hillary Rodham Clinton defeated Senator Barack Obama in Pennsylvania on Tuesday by enough of a margin to continue a battle that Democrats increasingly believe …

Obama Shifting Focus From Clinton to McCain  —  EVANSVILLE, Ind. — Senator Barack Obama opened the next phase of his presidential campaign here Tuesday evening, seeking to turn his focus away from Senator Hillary Rodham Clinton and persuade party leaders that time is running out for Democrats …

Why Clinton won Pennsylvania  —  For all the campaigning and money spent, Hillary Rodham Clinton won Pennsylvania with the same base of white women, working-class voters and white men that revived her candidacy in Ohio last month.  The demography that has defined the Democratic race went largely unchanged, according to exit polls.