text:  President Biden's facing more calls from Democratic lawmakers to drop out of the presidential race as questions continue to mount over his mental fullness. Five members of Congress have publicly called for him to step aside. Four more senior Democratic lawmakers have said so in a private call. Biden's repeatedly vowed to stay in the race. He sat down for an interview on Friday with ABC's George Stephanopoulos, who asked if he could beat Donald Trump. Have you convinced yourself that only you can defeat him?