Voices: “We already gave every document we have, every witness we have,” said Rudolph Giuliani, Mr. Trump’s personal lawyer, referring to the special counsel investigation. “I don’t think the White House should sit by and have them do it all over again.”

Closer look: Scholars say the Constitution deems that offenses involving the lawless use of official power could justify removal from office. Does Mr. Trump’s conduct, as described in the special counsel’s report, clear that bar? Impeachment proceedings against Presidents Richard Nixon and Bill Clinton indicate that it could.

Another angle: Before she was forced to resign as homeland security secretary, Kirstjen Nielsen became increasingly worried about Russian interference in the 2020 election. A top official warned her not to tell the president, The Times has learned.