 President Biden back at the White House today after being at Camp David over the weekend and responding to the Supreme Court's ruling on presidential immunity. Meanwhile, many Democrats are questioning whether or not Biden has the mental capacity to serve another four years as president. ABC's Jay O'Brien joins us now to talk about that. Jay, what are some of those concerns and who's talking? The first congressional Democrat to say that Joe Biden should drop out of the race, that there should be a new Democratic nominee tomorrow.