James Comey is scheduled to testify before the Senate Intelligence Committee on Thursday. With all the major networks and cable stations set to broadcast the hearings live, President Trump will likely be fuming as it happens.

Robert Costa at the Washington Post says multiple sources told him, Trump will have Twitter at the ready:

Oh, there is no question he will “feel the need to respond.” President Trump’s inability to contain himself is well documented. Whenever he perceives he’s being wronged, or when somebody says something he sees as vindication, the president hops on Twitter and leaves his thoughts out in the open for everybody to see.

The most explosive moments will likely come when Comey is asked about whether or not he felt pressured by President Trump to end the counterintelligence investigation into Russia’s meddling in the 2016 election. News reports have surfaced saying Comey will testify he doesn’t think the President obstructed justice but only in the capacity as a witness. He is going to express how he felt, and that may be a big issue.