Health care: The candidates sparred angrily over whether to wipe out private insurance and institute a government-run system.

Highlights: Gov. Steve Bullock of Montana took advantage of his debut, arguing for a more moderate Democratic Party. Former Representative John Delaney consistently and combatively staked out centrist positions, often overshadowing other moderates. Here are more takeaways.

The details: We took a look at which candidates got the most speaking time and fact-checked what they talked about. Campaign strategists and consultants on the left and on the right weighed in.

Quotable: Marianne Williamson, the self-help author who has been widely mocked for her talk of political love, delivered a sharp answer on reparations. “It’s not $500 billion in financial assistance,” she said, “it’s $200 to $500 billion payment of a debt that is owed.”

Get ready for Round 2

The dynamic between Joe Biden and Kamala Harris will be closely watched tonight, after he struggled to respond to her criticism of his record on race during the first set of debates. Since then, Mr. Biden — who clashes on the issue of policing with Cory Booker and on health care with Bernie Sanders — has been aggressively defending his record.