After Mr Raskin read the indictment in full, the managers left and left the matter to the Senate, who wanted to come back at 2:30 p.m. Tuesday to summon Mr Trump to answer for the indictment. Senators were expected to officially agree to a schedule for the coming weeks and swear an 18th century oath of impeachment to ensure “impartial justice”.
Mr. Trump’s new defense attorney, Butch Bowers, reportedly tried to get at least one other attorney for him, according to people familiar with the planning. He also worked with Jason Miller, an advisor to Mr. Trump, on a public relations campaign.
Other aspects of the process were also brought into focus on Monday. Senator Patrick J. Leahy, the Senate President pro tempore, said he would lead the process and take on a role filled by Chief Justice John G. Roberts Jr. last year.
The constitution states that the United States Chief Justice shall preside over any impeachment proceedings against the president or vice president. However, there is no explicit guidance on who should oversee the process for others, including past presidents. Mr Schumer said Chief Justice Roberts was not interested in repeating a time-consuming role that would involve him and the Supreme Court in the political battle over Mr Trump.
The role was largely ceremonial in the first impeachment trial against Mr Trump a year ago. But as chairman, Mr. Leahy, Democrat of Vermont, could make decisions on key issues related to the admissibility of evidence and whether a trial against a former president is constitutionally admissible. He will also keep a vote himself.
The job could have gone to Vice President Kamala Harris in her capacity as President of the Senate. But there were clear disadvantages to Ms. Harris in overseeing what is seen by some as an attempt by the Democrats to use their newfound power to punish the leader of the rival political party.
Mr Leahy’s presence on the podium could open the Democrats to similar charges from the right, especially if he makes a controversial decision, but officials said there would be no clear alternative without the Chief Justice. In a statement, Mr. Leahy insisted that he would take his trial oath “extremely seriously” in order to administer “impartial justice”.
Maggie Haberman Post coverage from New York, and Emily Cochrane and Adam Liptak from Washington.