A bipartisan group of senators is preparing to revive legislation to protect special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE from being fired.

ADVERTISEMENT The legislation protects Mueller, or any other special counsel, in the event he is fired by providing for an "expedited review" of the firing. If a court determines that it wasn't for "good cause," the special counsel would be reinstated.

It would also codify Justice Department regulations that say only a senior department official could fire Mueller or another special counsel.

Tillis said in a statement to The Associated Press, which first reported plans to reintroduce the bill this week, that he believes it "is true" that Trump won't fire Mueller.

"However, I also believe this bipartisan legislation is good government policy with enduring value across the current and future administrations," Tillis said.

House Democrats introduced similar legislation last week on the first day the party took back control of that chamber, arguing the bill was key to making sure Mueller's probe into the 2016 election continues unimpeded. Both acting Attorney General Matthew Whitaker and William Barr, Trump's pick to be attorney general, have been critical of the investigation.

Though Graham is taking over as Judiciary Committee chairman, the bill is unlikely to clear the Senate. GOP leadership is opposed to the bill and other Republican senators believe it is unconstitutional.

Under the upper chamber's rules, senators can go to the floor to request a vote or passage of any bill or nomination. But any senator can block their requests.