Here's who will be onstage for tonight's Democratic debate co-hosted by PBS NewsHour and Politico, what time it starts, and how to watch

The requirements to make the sixth Democratic presidential primary debate to be held tonight, December 19, were the strictest the Democratic National Committee has set so far, and it will make for the most intimate debate stage yet.

Candidates had to both secure 200,000 individual donors, of which 800 must be from 20 different states or territories, and earn 4% in four DNC-approved national or early-state polls from Iowa, New Hampshire, South Carolina, or Nevada.