FBI Director James Comey will testify on Capitol Hill today, where he's expected to publicly reveal for the first time whether the FBI is investigating Trump campaign ties to Russia, in addition to potentially clearing up any remaining questions on Trump's unsubstantiated wiretapping claims.

Ahead of that hearing, President Trump tweeted:

James Clapper and others stated that there is no evidence Potus colluded with Russia. This story is FAKE NEWS and everyone knows it! — Donald J. Trump (@realDonaldTrump) March 20, 2017

The Democrats made up and pushed the Russian story as an excuse for running a terrible campaign. Big advantage in Electoral College & lost! — Donald J. Trump (@realDonaldTrump) March 20, 2017

The real story that Congress, the FBI and all others should be looking into is the leaking of Classified information. Must find leaker now!— Donald J. Trump (@realDonaldTrump) March 20, 2017