NEW : Barack Obama makes fun of Hillary Clinton for drinking a shot in front of media . NEW : Clinton 's verbal attacks on Obama met with boos from audience . Comment: At fundraiser , Obama said some Pennsylvanians bitter and clinging to guns , religion .
NEW : Barack Obama makes fun of Hillary Clinton for drinking a shot in front of media . NEW : Clinton 's verbal attacks on Obama met with boos from audience . Clinton has accused Obama of being out of touch , elitist for remarks at fundraiser . At fundraiser , Obama said some Pennsylvanians bitter and clinging to guns , religion .