Sen. Lindsey Graham pulled no punches in responding to House Speaker Nancy Pelosi on when, or if, she would deliver impeachment articles to the Senate, calling the threat “Constitutional extortion.”

“If House Dems refuse to send Articles of Impeachment to the Senate for trial it would be a breathtaking violation of the Constitution, an act of political cowardice, and fundamentally unfair to President @realDonaldTrump,” Graham (R-SC) tweeted in a series of posts Thursday.

“Not allowing the Senate to act on approved Articles of Impeachment becomes Constitutional extortion and creates chaos for the presidency,” he added. “It also sets in motion a tremendous threat to our Constitutional system of checks and balances.”

After the House of Representatives passed two articles of impeachment against President Trump on Wednesday, Pelosi (D-Calif.) told reporters that it would not immediately submit the articles to the Senate as was done in the 1998 impeachment of President Bill Clinton.

“We will make a decision as to when we are going to send it when we see what they are doing on the Senate side. That’s a decision that we will make jointly,” Pelosi said.

She added that she and her House colleagues were waiting for the Senate to set their rules for the trial.

“We are not sending it tonight because it’s difficult to determine who the [impeachment] managers would be until we see the arena in which we will be participating,” Pelosi added in the press conference.

Graham has been adamant that the impeachment process against Trump would “die quickly” in the Senate under his watch, and that he had already made up his mind to acquit.

“I think what’s best for the country is to get this thing over with,” Graham told CBS’ “Face the Nation” in an interview that aired Sunday. “I [have] clearly made up my mind, I’m not trying to hide the fact that I have disdain for the accusations in the process, so I don’t need any witnesses.”