 As calls to dropout grow, the president campaigns Sunday in Pennsylvania. I'm Ted Lindner, Fox News. The president speaking to campaign workers during a Sunday swing through the Keystone State. Fox's Kevin Uretzky with all the details. The president told supporters at the campaign site in Philadelphia the key to the election remains engaging with voters on an individual basis. They want to know we care. There's nothing letting someone know you care like knocking on the door and saying...