The Justice Department contacted another of Mr. Trump’s lawyers, Alina Habba, late last year about an appearance. Ms. Habba does not represent Mr. Trump in the documents case, but she spoke about it on television. She also signed an affidavit in another case saying she had searched Mr. Trump’s office and residence in May, meaning investigators may be interested in whether she saw government documents there.
The Justice Department is also seeking to question a former Trump lawyer, Alex Cannon, who people briefed on the matter said repeatedly urged Mr. Trump to turn over the boxes of material that the National Archives was seeking.
Mr. Trump’s disclosure of newly located documents has been ongoing. Lawyers for the former president notified prosecutors recently about a potential witness they might want to speak with: a relatively junior former staff member to Mr. Trump who had uploaded classified material onto a laptop and discovered it only after the fact, according to a different person familiar with the incident.
The discovery occurred when the staff member was placing a large trove of Mr. Trump’s daily White House schedules on the computer and realized that a small amount of classified material had been included in the schedules, the person said.
In an interview with CNN on Sunday, one of Mr. Trump’s lawyers, Tim Parlatore, said the Justice Department had issued a subpoena for a manila folder marked “classified evening summary” after Mr. Trump’s aides provided the department with reports on materials they had found after their own searches. He said it was not actually a classified marking, contained nothing and was being used by Mr. Trump to dim a blue light on his bedside phone at Mar-a-Lago that “keeps him up at night.”
“I’ve never seen anything like it,” Chuck Rosenberg, a former federal prosecutor and former F.B.I. official, said of the cascade of Trump aides and lawyers becoming drawn into investigations. “It’s just a whirling dust cloud, and everyone who gets near it gets covered in grime.”
While Mr. Smith did not ask Mr. Garland’s permission to subpoena Mr. Pence, one of the most extraordinary developments of his short time as special counsel, he almost certainly consulted him about it: Under the regulations, special counsels are expected to report major developments to the attorney general.