A furious James Comey tweeted Friday to lash Attorney General William Barr for “sliming” his own department.

The former FBI director was referring to Barr’s questioning the Justice Department and the FBI for launching an investigation into Russian interference in the presidential election and possible collusion by Donald Trump’s campaign.

Comey told him to put up or shut up:

“If there are bad facts, show us, or search for them professionally and then tell us what you found,” he wrote. “An AG must act like the leader of the Department of Justice, an organization based on truth.”

In an added dig, Comey said: “Donald Trump has enough spokespeople.”