WASHINGTON — The special counsel’s office and President Trump found themselves in rare agreement on Friday over Mr. Trump’s former campaign chairman Paul Manafort: Nothing is off the table.

Prosecutors for the special counsel, Robert S. Mueller III, said in court that they have not decided whether to charge Mr. Manafort with additional crimes after accusing him this week of lying to investigators in violation of his plea agreement.

“We are still debating what the consequences will be,” said one of the prosecutors, Andrew Weissmann.

As for Mr. Trump, upon hearing that Mr. Manafort was facing more prison time, he had said earlier this week that while he had not specifically discussed pardoning Mr. Manafort, he “wouldn’t take it off the table.”