President Trump took to Twitter after Sally Yates' testimony on Russian interference in the 2016 election.

Former acting attorney general Sally Yates and former director of national intelligence James Clapper appeared before a Senate Judiciary subcommittee Monday to testify on Russian meddling in the 2016 election.
Shortly after their testimony, President Trump posted a series of tweets.
He said, "Director Clapper reiterated what everybody, including the fake media already knows- there is 'no evidence' of collusion w/ Russia and Trump," and "Sally Yates made the fake media extremely unhappy today --- she said nothing but old news!"
Trump continued, "The Russia-Trump collusion story is a total hoax, when will this taxpayer funded charade end?" and "Biggest story today between Clapper & Yates is on surveillance. Why doesn't the media report on this? #FakeNews!"
However, Trump didn't address one of the biggest stories that emerged from Yates' remarks on what she told the White House about former national security adviser Michael Flynn who had not been fully forthright concerning his discussions with Russians.
Yates said, "the Russians...knew that General Flynn had misled the vice president and others, because in the media accounts, it was clear from the vice president and others that they were repeating what General Flynn had told them, and that this was a problem because not only did we believe that the Russians knew this, but that they likely had proof of this information."
She added, "And that created a compromise situation, a situation where the national security adviser essentially could be blackmailed by the Russians."