With over 20 Democrats announcing 2020 presidential bids, the campaign reflects the chaos of a NASCAR race.

But already there is one defining separation in the pack: Will Democrats steer hard left with Bernie Sanders, Elizabeth Warren or Kamala Harris, or center-left with Joe Biden?

The dangerous myth Democrats believe is that anyone can beat Donald Trump, but the polls show only Biden with a significant lead. For many Democrats, however, including young voters, Biden is old school and too moderate. They want their vote to count on some big progressive, even socialist, ideas.

So here’s the Democrats’ dilemma: The principle or the politics. Do they want to win the presidency, where Biden is their best bet, or seek to change the country but lose? We have a year to learn their answer.