 Shannon, on the banks of the Susquehanna, President Biden has returned here to Pennsylvania, a state he has visited more than any other outside of his home in Delaware. And despite calls from some of his fellow Democrats to bow out of the race, in an exclusive interview with ABC News anchor George Stephanopoulos, the president says only one thing can get him to do that. If you can be convinced that you cannot defeat Donald Trump, will you stand down?