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Obama Changes Approach to Reach Blue-Collar Voters in Pennsylvania

WILKES-BARRE, Pa. -- When Sen. Barack Obama's bus rolls to a stop Wednesday in Philadelphia, he will have spent six days on the road and $3 million in television ads trying to bolster his chances in a state where polls show him running well behind Sen. Hillary Rodham Clinton (N.Y.).
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By Shailagh Murray and Perry Bacon Jr.