Reporters pressed Wray about the Monday raid, which reportedly has to do with an investigation into whether Trump took classified materials from the White House after he left office, during a visit to the FBI’s field office in Omaha, Nebraska.

As Republicans in Congress have demanded Wray and Attorney General Merrick Garland speak out or even be removed from their positions, Trump raised the prospect of agents planting evidence.

Asked to respond to Trump’s suggestion, Wray declined to jump into the fray. “As I’m sure you can appreciate, that’s not something I can talk about,” he said. Wray then referred such a question to the Justice Department. Both the DOJ and FBI have so far declined to comment publicly about the raid.