Donald Trump took to Twitter Sunday to rage about “Leakin’ James Comey,” claiming the former FBI director lied to Congress. We can understand his pique, since we advised Mr. Trump in January 2017 to fire Mr. Comey as soon as he became President. But fuming in frustration now won’t do any good. The way to expose the truth about the FBI’s behavior in the 2016 presidential campaign is to declassify and release all the relevant documents.

Mr. Trump promised this fall to release many of these records only to renege under FBI and insider pressure. After the election the President again threatened to release them if Democrats went ahead with their multiple investigations into the 2016 campaign.

Well, what are you waiting for, Mr. Trump? Every Democrat in range of a microphone is promising to investigate your every Presidential decision, plus your taxes, business and family.

Meanwhile, New York Democrat Jerrold Nadler, who will chair the House Judiciary Committee in January, said Friday he will shut down the investigation into FBI and Justice decision-making. He called it “a waste of time to start with.” If Mr. Trump really wants Americans to know about the FBI’s 2016 political machinations, he’ll have to be the agent of transparency.