Threat, promise, or red flag to a bull?

After a few days of non-stop tirades against current Attorney-General Jeff Sessions by President Trump, increasing numbers of Republicans are coming out in support of the "beleauered" AG urging Trump to stop.

As Bloomberg reports, a number of Republicans have called White House officials - and even Trump personally - to warn against removing Sessions, according to a Senate GOP aide who asked not to be identified discussing the private conversations. Their message has been that Sessions is universally liked on Capitol Hill and that removing him would be one of Trump’s biggest mistakes as president.

But, just in case the message from senior Republicans was not getting to the President, Republican Senator Lindsey Graham of South Carolina told CNN on Thursday morning...

WATCH: "Any effort to go after Mueller could be the beginning of the end of the Trump presidency," says Sen. Lindsey Graham. pic.twitter.com/x2scZCKUIo — NBC News (@NBCNews) July 27, 2017

“If Jeff Sessions is fired, there will be holy hell to pay.”

Graham described as “chilling” a tweet posted by Senate Judiciary Chairman Chuck Grassley late Wednesday in which the Iowa Republican said there was “no way” his panel would consider the nomination of a replacement for Sessions.

“There will be no confirmation hearing for a new attorney general in 2017,” Graham said.

Graham also warned Trump against any efforts to remove the special prosecutor appointed in the Russia probe, former FBI Director Robert Mueller.

“Any effort to go after Mueller could be the beginning of the end of the Trump presidency,” Graham said on CNN.

Over/Under on Trump's tweet response to Graham's 'threat' is currently 90/120 mins.