The filing by Jack Smith was the latest volley in a battle over the timing of the case accusing the former president of plotting to overturn the 2020 election.
The court filing was the latest development in a battle between Mr. Trump and the special counsel, Jack Smith, over whether the former president can be prosecuted for his actions while in office.
The roughly 1,700 messages are from the cellphone of Representative Scott Perry, who was involved in discussions with Trump administration officials about overturning the election.
The special counsel Jack Smith told the judge she should keep the trial’s start date in March and continue making decisions as the former president appeals one of her rulings.