On Politics: Pelosi Cautions on Impeachment

President Trump and his businesses sued the chairman of the House Oversight and Government Reform Committee to quash a subpoena seeking his financial records.

Representative Seth Moulton of Massachusetts, known for attempting to deny Ms. Pelosi the House speaker’s gavel, is running for president, becoming the 19th candidate to enter the Democratic primary field. Here’s more on his campaign and where he stands on the issues.

Seeking to avoid conflict-of-interest concerns, former Vice President Joe Biden plans to shut down his own personal charity after joining the presidential campaign.

Youth-led movements have often helped define political moments, and Democratic 2020 hopefuls have taken note of the potential power of millennial and Generation Z voters. But effectively reaching them is the hard part.

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Today’s On Politics briefing was compiled by Isabella Grullón Paz in New York.

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Is there anything you think we’re missing? Anything you want to see more of? We’d love to hear from you. Email us at onpolitics@nytimes.com.