Amy Walter:

And it's so ridiculously early. I don't remember it being this crowded and this active this early, to have this many candidates going into places like Iowa and South Carolina, and to have the lines to get into some of these events snaking around the corner a year from the primary.

It just goes to show you too how serious Democratic voters in those states, or voters who are interested in looking at these Democratic candidates, are.

And Tam is right. I mean, you have — it's a little bit like spring training, right? You're trying out all your different pitches and seeing what works and what doesn't. But you're also really — it's because you have a wide-open field. There is really no obvious front-runner.

Joe Biden starts off at the top of all the polls, in large part because he's the best known candidate in the field. There's no guarantee that his standing on top of the polls sticks once we get the whole field in place and the campaigns really start.

And Tam made a point about everybody's trying to find their lane. Democrats are also trying to figure out, Democratic voters, what they want, right? Do they want the most liberal candidate? Do they want the candidate who's most likely to beat Donald trump? Do they want a pragmatic conservative, pragmatic progressive? Do they want to doer, a dreamer, as John Hickenlooper said?

And there's everything and a lot in between for voters.