Welcome to a special debate night edition of On Politics. I’m Lisa Lerer, your host.

¡Bienvenidos a Miami! It seems like the entire Democratic world has descended on this city, where 10 candidates will take the stage tonight for the first debate of the 2020 election.

Right now I’m chatting on NYTimes.com with my colleagues Maggie Haberman, Astead Herndon, Reid Epstein and Sydney Ember. Join us here — we’ve also got live video of the debate.

Tuning in a little late? You can catch up on the biggest moments so far here.

Need a primer? Here’s everything you need to know about tonight’s debate.

And here’s a cool visual guide to the candidates participating in the debate, and some of the key dynamics between them.