text:  Well, he's been trying to prove the critics wrong, showing that he has what it takes to be in the race, trying to show that that poor debate was a one-off. He's making several stops in the swing state of Pennsylvania. He went to a union hall in Harrisburg, a Pentecostal church in Philadelphia, where the pastor led a call and response in support of the president. He's given unscripted remarks. He's shaken dozens and dozens of hands, campaigned on a really hot day. But that's all very different than a debate.