Watch highlights from the Democratic debate in less than 3 minutes
Bernie Sanders, Elizabeth Warren and Marianne Williamson (NBC News)

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.