By Caren Bohan
WALLINGFORD, Pennsylvania (Reuters) - Barack Obama tried his hand at bowling, bottle-fed a calf at a dairy farm and toured a chocolate factory as he sought to connect with voters in Pennsylvania, a crucial state in the fight for the Democratic U.S. presidential nomination.
Ending a six-day bus tour on Wednesday in a state where his rival Hillary Clinton is heavily favored, the Illinois senator hoped to erode her advantages, especially with white working-class voters who have been slower to warm up to him than the young people and more affluent voters who have flocked to his rallies.
The Columbia University and Harvard-educated Obama, known for his sweeping oratory, sought to show a more down-to-earth side of himself, talking of his upbringing by a single mother and his early career as a community organizer in Chicago helping laid-off steelworkers.
Obama, who would be the first black president, leads in a tight national race with Clinton, who would be the first woman to win the White House, for the right to represent the party against presumed Republican nominee John McCain in the November presidential election.
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http://www.reuters.com/article/politicsNews/idUSN0229337820080403