text:  All of us have good days and bad days. There are days I'm tired. There are days I feel well-rested. There are days I feel especially sharp and days I don't. But I'm not in Joe Biden's shoes. If Joe Biden has days where he barely knows where he is or what he's doing and other days when he's competent and cogent and there, and he's making some of the biggest decisions in the world, literally, and we're going to trust this to somebody who doesn't know he's there all the time, you're right, that's frightening.