3. The Democratic presidential candidates met tonight in Houston for a debate.

The most anticipated matchup is Joe Biden vs. Elizabeth Warren, two leading candidates with starkly different ideologies who have never shared a debate stage. Above, the candidates on stage.

Our reporters predict clashes over health care, and perhaps foreign policy, which has been mostly absent from the Democratic race. ABC, the host network, has asked the candidates to refrain from swearing. (Looking at you, Beto O’Rourke.)

The event started at 8 p.m. Eastern on ABC and Univision. We have live updates and analysis from our reporters.

On social media, you’ll see people cheering on their favorite candidates and making memes of the best moments. Amanda Hess, a Times critic at large, explores how internet fan culture is swallowing politics.