This question is important because, if Mr. Trump truly was upset about the Clinton investigation, he would have shown an early distaste for Mr. Comey.

• What did you think about Mr. Comey’s intelligence briefing on Jan. 6, 2017, about Russian election interference?

The briefing revealed that American intelligence agencies had concluded that Russian operatives meddled in the election to hurt Mrs. Clinton and to boost Mr. Trump. Mr. Trump has repeatedly cast doubt on these conclusions and said he believes the Russian president, Vladimir V. Putin, who denies any interference.

• What was your reaction to Mr. Comey’s briefing that day about other intelligence matters?

This question addresses documents written by a retired British spy, Christopher Steele, who said that Russia had gathered compromising information on Mr. Trump. The documents, which became known as the Steele Dossier, also claim that the Trump campaign had ties to the Russian government. Mr. Comey privately briefed Mr. Trump about these documents.

• What was the purpose of your Jan. 27, 2017, dinner with Mr. Comey, and what was said?

A few weeks after his briefing, Mr. Comey was called to the White House for a private dinner. Mr. Comey’s notes say that Mr. Trump raised concerns about the Steele Dossier and said he needed loyalty from his F.B.I. director. This question touches on Mr. Trump’s true motivation for firing Mr. Comey: Was he dismissed because he was not loyal and would not shut down an F.B.I. investigation?

• What was the purpose of your Feb. 14, 2017, meeting with Mr. Comey, and what was said?

That was a key moment. Mr. Comey testified that the president told him, “I hope you can see your way clear to letting this go, to letting Flynn go.” Mr. Trump has denied this.

• What did you know about the F.B.I.’s investigation into Mr. Flynn and Russia in the days leading up to Mr. Comey’s testimony on March 20, 2017?

Mr. Comey’s testimony publicly confirmed that the F.B.I. was investigating members of the Trump campaign for possible coordination with Russia. Mr. Mueller wants to know what role that revelation played in Mr. Comey’s firing.

• What did you do in reaction to the March 20 testimony? Describe your contacts with intelligence officials.

In the aftermath, The Post reported, Mr. Trump asked the United States’ top intelligence official, Daniel Coats, to pressure Mr. Comey to back off his investigation. Mr. Mueller wants to ask Mr. Trump about his contacts with Mr. Coats as well as the C.I.A.’s director at the time, Mike Pompeo, and the National Security Agency’s director, Michael S. Rogers. The conversations could reflect Mr. Trump’s growing frustration with Mr. Comey — not about the Clinton case, but about his refusal to shut down the Russia inquiry.