Republican Sen. Lindsey Graham warns of 'holy hell to pay' if Trump fires Sessions

Sen. Lindsey Graham said Sessions "deserves better" from President Trump.

"This effort to basically marginalize and humiliate the attorney general is not going over well in the Senate," Graham told reporters today. "I don't think it's going over well in the conservative world ... If Jeff Sessions is fired, there will be holy hell to pay."

Graham, a Senate Judiciary Committee member from South Carolina, stressed that there would be no confirmation hearing for a new attorney general in 2017 and that Trump should respect Sessions as a person who "deserves better."

Graham reiterated his support for Mueller's Russia investigation, saying he has no reason to think Mueller is compromised. Graham warned that he will introduce a bill next week that would prevent the special counsel from being fired when "empaneled to investigate the president" unless there is judicial review of the firing.

"The idea that the president would fire Mueller or have somebody fire Mueller because he doesn't like Mueller or Mueller is doing something he doesn't like — then we have become Russia," Graham said. "So the red line should never be drawn ... No president can do that."

Graham added that the "president is not in the business of drawing red lines when it comes to the law" and that he hoped Trump would "calm down" to work with Congress on Afghanistan, taxes and health care instead.

But White House communications director Anthony Scaramucci told conservative radio host Hugh Hewitt on Tuesday morning that he asked Trump, "Why would you fire him?" and advised against pursuing it.

ABC News' Ali Rogin, Saisha Talwar and Dylan Wells contributed to this report.