President Trump mischaracterized why congressional testimony from an anonymous whistleblower is growing unlikely and attacked the House impeachment inquiry in a series of tweets tonight.

The attorneys for the whistleblower who lodged a complaint with the intelligence community inspector general related to Trump's July 25 phone call with Ukraine's President wrote in a Washington Post op-ed today that there is no need for their client to testify in person, even behind closed doors.

Andrew Bakaj and Mark Zaid argue that their client's anonymity needs to be protected and say he has no additional information to offer about the call, writing: "Because our client has no additional information about the president's call, there is no justification for exposing their identity and all the risks that would follow."

In a separate tweet, Trump attack the impeachment process, calling it a scam.

The President also floated the idea of suing Democratic Rep. Adam Schiff. Trump has brought this up numerous times.