GOP Sen. James Lankford James Paul LankfordMcConnell works to lock down GOP votes for coronavirus bill Charities scramble to plug revenue holes during pandemic Warren calls for Postal Service board members to fire DeJoy or resign MORE (Okla.) warned on Thursday that Republicans could go "nuclear" to speed up consideration of President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE's nominations.

"My hope is that we can get this done in the next month [with Democratic support]. If we can't, we're in a logjam that we're going to have to resolve through a nuclear option," Lankford told conservative radio host Hugh Hewitt.

Pressed if he expects Republicans would go "nuclear" to change the rules on most nominations to require only a simple majority to approve them, Lankford added: "I do, actually. I think that's what happened in 2013 when Democrats got frustrated with it, I think they did set the precedent."

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Republicans have been privately mulling limiting the amount of debate time needed before they can take a final vote on hundreds of the president’s picks.

They argue Democrats are using the Senate’s rulebook to stonewall and slow-walk nominees, hindering GOP leadership's ability to schedule votes on legislation.

The Senate Rules Committee held a hearing last month on Lankford's proposal to limit the amount of debate time on nominations after they’ve already cleared a procedural hurdle and shown they have enough support to pass.

Under Lankford’s resolution, post-cloture debate for non-Cabinet executive nominees would shrink from 30 hours down to eight hours. For district court nominees, debate would be limited to two hours.

The Senate passed a similar resolution in 2013 to limit debate for most nominations in a 78-16 vote. Democrats controlled the chamber at the time.

But nomination fights have grown increasingly political since then. Democrats, led by then-Majority Leader Harry Reid Harry Mason ReidSenate Republicans signal openness to working with Biden Mellman: The likely voter sham Bottom line MORE (Nev.), got rid of the 60-vote filibuster for lower-court and executive nominations.

Republicans, in turn, got rid of the same hurdle for Supreme Court nominees last year. Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans signal openness to working with Biden Senators offer disaster tax relief bill Trump spikes political football with return of Big Ten season MORE (R-Iowa), the chairman of the Judiciary Committee, has also indicated that he will nix the “blue slip” for circuit court nominees if he thinks Democrats are abusing the protection.

It's unclear if Republicans would have the votes to change the rules on their own.

With Sen. Doug Jones (D-Ala.) sworn in on Wednesday, GOP leadership has a narrow 51-49 majority in the Senate.

GOP Sens. Susan Collins Susan Margaret CollinsThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally Gideon leads Collins by 12 points in Maine Senate race: poll Senate leaders quash talk of rank-and-file COVID-19 deal MORE (Maine) and John McCain John Sidney McCainThe electoral reality that the media ignores Kelly's lead widens to 10 points in Arizona Senate race: poll COVID response shows a way forward on private gun sale checks MORE (Ariz.) said last year that they did not support further changes to the rules, but haven't weighed in on the looming fight more recently.