A federal prosecutor in Virginia whose monthslong mortgage fraud investigation into New York Attorney General Letitia James has not resulted in criminal charges resigned Friday under pressure from the Trump administration.

Erik Siebert confirmed his departure in an email to colleagues, reviewed by The Associated Press, in which he praised them as the “finest and most exceptional” of Justice Department employees but made no mention of the political turmoil that preceded his resignation.

The replacement of Siebert as U.S. attorney for the prestigious Eastern District of Virginia office comes amid a push by Trump administration officials to indict James, a perceived adversary of the president who has successfully sued him for fraud. President Donald Trump told reporters in the Oval Office on Friday that he wanted Siebert “out” and multiple people familiar with the matter later told the AP that Siebert had informed his colleagues of his plan to resign from the position.