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

Sens. Christopher CoonsChristopher (Chris) Andrew CoonsOvernight Defense: Trump unveils new missile defense plan | Dems express alarm | Shutdown hits Day 27 | Trump cancels Pelosi foreign trip | Senators offer bill to prevent NATO withdrawal Bipartisan senators reintroduce bill to prevent Trump from withdrawing from NATO Sunday shows preview: Washington heads into multi-day shutdown MORE (D-Del.), Thom TillisThomas (Thom) Roland TillisCentrist efforts to convince Trump to end shutdown falter GOP reasserts NATO support after report on Trump’s wavering Leaders nix recess with no shutdown deal in sight MORE (R-N.C.), Cory BookerCory Anthony Booker2020 Democrats barnstorm the country for MLK weekend Ocasio-Cortez returns to 'The Late Show' on Monday We need action on personal cybersecurity MORE (D-N.J.) and Lindsey GrahamLindsey Olin GrahamTrump pitches new plan to reopen government amid Dem pushback Democrats signal they'll reject Trump shutdown proposal Dems revive impeachment talk after latest Cohen bombshell 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 TrumpSunday shows preview: Shutdown negotiations continue after White House immigration proposal Rove warns Senate GOP: Don't put only focus on base Ann Coulter blasts Trump shutdown compromise: ‘We voted for Trump and got Jeb!’ 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 FlakeSchumer recruiting top-notch candidate for McCain Senate seat The Hill's Morning Report — Trump eyes wall money options as shutdown hits 21 days Poll: Sanders most popular senator, Flake least 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.