1. Deputy Attorney General Rod Rosenstein, who appointed the special counsel and is overseeing his Russia investigation, discussed invoking the 25th Amendment to oust President Trump last year.

In the days after the firing of the F.B.I. director at the time, James Comey, Mr. Rosenstein also proposed secretly recording his conversations with the president, The Times has learned. The extreme suggestions show Mr. Rosenstein’s state of mind during those disorienting days.

Mr. Rosenstein made the remarks about secretly recording Mr. Trump and about the 25th Amendment in meetings and conversations with other Justice Department and F.B.I. officials. He has disputed The Times’s account.