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 PITTSBURGH (AP) - Barack Obama got a surprise boost in the last big state of the long Democratic campaign Friday with an endorsement from Pennsylvania Sen. Bob Casey Jr., while another Obama supporter sought to nudge Hillary Rodham Clinton out of the race.
Clinton leads by double-digits in Pennsylvania polls, and Obama hopes Casey's endorsement will earn him a second look from the state's white, working class and Catholic voters — groups that have leaned toward Clinton in other Democratic contests this year.
Clinton, on the other hand, is hoping a victory in Pennsylvania will help persuade party "superdelegates" to support her and allow her to catch Obama in the race for National Convention delegates.
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