Watch highlights from the Democratic debate in less than 3 minutes

Half of the Democratic presidential field gathered onstage in Detroit for the first night of the second round of debates.

Senators Bernie Sanders (I-VT) and Elizabeth Warren (D-MA) faced strong challenges Tuesday night from more centrist candidates in the debate moderated by CNN, and long-shot candidate Marianne Williamson delivered a memorable rebuke of the "dark psychic force of collectivized hate" unleashed by President Donald Trump.

Watch the biggest moments from the debate, posted online by NBC News.