By night's end, New Hampshire could begin culling the Democrats' unwieldy 2020 class, which still features nearly a dozen candidates battling for the chance to take on U.S. President Donald Trump fall.

The Democratic presidential race is deeply unsettled heading into the New Hampshire primary. It may be up to the state to put some structure around the chaotic contest, with Iowa being unable to declare a clear winner.

Jackson Proskow says Democrats face a nagging question ahead of Tuesday's New Hampshire primary: which candidate is most likely to beat Donald Trump?

Michael Bloomberg has already spent over $300 million on TV, radio and digital advertising, according to the ad tracking firm Advertising Analytics.

Democrats in Nevada, third-in-line to cast votes on the 2020 presidential field, had planned to use two apps during their Feb. 22 caucuses: one to tabulate results and a second pre-loaded onto tablets for voters to use at caucus sites during four days of early voting.

In a statement, the Iowa Democratic Party said it had found "inconsistencies in the reporting of three sets of results" but that it was not caused by a hack or intrusion.

The party said it expects to release data later Tuesday after manually verifying its data against paper backups.

In an update on Tuesday, the party told campaigns it would release more than half of the caucus results at 5 p.m. ET.

The Associated Press VoteCast is a survey of more than 2,800 voters who said they planned to take part in Monday's Democratic caucuses in Iowa.

The Iowa caucuses kick-starts America's primary season which runs until early summer. Why does Iowa go first and why does it matter? Here's what the experts say.