A bipartisan group of senators is preparing to revive legislation to protect special counsel Robert MuellerRobert (Bob) Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE from being fired. 

Sens. Christopher CoonsChristopher (Chris) Andrew CoonsMnuchin says carbon capture tax credit guidance will be out soon Mnuchin signals administration won't comply with subpoena for Trump tax returns Menendez, Rubio lead Senate effort to regulate Venezuelan sanctions MORE (D-Del.), Thom TillisThomas (Thom) Roland TillisLawmakers call for investigation after census hired registered sex offender Dem Senate campaign arm hits GOP lawmakers over Trump tax law Graham encourages Donald Trump Jr. to plead the Fifth MORE (R-N.C.), Cory BookerCory Anthony BookerDe Blasio pitches himself as tough New Yorker who can take on 'Don the con' Sanders pledges to only nominate Supreme Court justices that support Roe v. Wade From dive bars to steakhouses: How Iowa caucus staffers blow off steam MORE (D-N.J.) and Lindsey GrahamLindsey Olin GrahamTensions swirl around Iran as administration to brief Congress Press: Justin Amash breaks ranks with party Overnight Defense: Iran tensions swirl as officials prepare to brief Congress | Trump threatens war would be 'end of Iran' | Graham tells Trump to 'stand firm' | Budget talks begin MORE (R-S.C.) will reintroduce the legislation this week, spokespeople for Coons confirmed. 
 
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.
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It would also codify Justice Department regulations that say only a senior department official could fire Mueller or another special counsel.
 
Republican backers of the legislation have said they don't believe President TrumpDonald John TrumpThe Hill's Morning Report - White House, Congress: Urgency of now around budget GOP presses Trump to make a deal on spending Democrats wary of handing Trump a win on infrastructure MORE will fire Mueller, whom he has accused of leading a "witch hunt" against him, but that the legislation is good policy regardless of who is in the White House. 

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. 
 
Retired Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeThe Hill's Morning Report - White House, Congress: Urgency of now around budget Jeff Daniels blasts 'cowardice' of Senate Republicans against Trump WANTED: A Republican with courage MORE (R-Ariz.), Booker and Coons tried three times over roughly a month late last year to get a vote on the bill, but they were blocked each time. 
 
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.