 This is a special report from ABC News, the Biden interview. I'm Daria Albinger. President Biden says he is proud of what his administration has accomplished and he wants to finish the work. But at 81, is he really up to it? You know, the heart of your case against Donald Trump is that he's only out for himself, putting his personal interests ahead of the national interest. How do you respond to critics who say that by staying in the race, you're doing the same thing?