where do her supporters go? Ideologically, probably closer to Biden or Buttigieg. For those wanting a female candidate, or someone who has never lost, there's Warren. In either case, I don't see Bernie picking up much of Amy's base.

Sanders and Warren share much of the same fan base, so Iowa will be zero-sum for them. If you can give everyone healthcare in a well-regulated capitalist system, that seems more viable to me than a socialist candidate. So I would favor Warren, but Bernie may beat her here.

All our major candidates are good, but I am leaning Biden at this point. We have to win it all, and he's the one who can win the midwest and thereby the EC. The fact that Trump is terrified of him, as we see in the trial, says a lot. If Biden's the nominee, Trump winds up in a New York jail and he knows it.