How Biden Rebounded

So here’s what I think happened with the Democratic presidential nomination contest this year, at least so far. It’s still not entirely certain that Joe Biden will win, but I think Nate Cohn is right that the situation looks very difficult indeed for Bernie Sanders.

To begin with, I think Seth Masket is correct that this was a case of the party choosing, rather than the party jumping on a bandwagon established by voters. Here's how I would interpret the interaction between Democratic voters and party actors in February: