Sen. John Cornyn John CornynCalls grow for Biden to expand election map in final sprint Bipartisan praise pours in after Ginsburg's death Chamber of Commerce endorses McSally for reelection MORE (R-Texas), the No. 2 Senate Republican, on Thursday said knowing what the Republican healthcare bill will be before a procedural vote is a "luxury we don't have."

A Cornyn spokesman said the senator was referring to the open amendment process for the bill, which means that the final product could be altered.

Senate Republicans are divided on a path forward for their healthcare bill.

The two leading options are either taking up a bill that repeals ObamaCare but delays a replacement, or some updated version of the Senate's repeal-and replace-measure. Both of those bills do not have the votes to pass at the moment, however, though negotiations on the second measure are ongoing.

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Senate Republican leaders say they are planning a vote next week to begin debate on the House's ObamaCare repeal bill, which would allow them to begin debating amendments.

But some senators are reluctant to even vote for the initial procedural motion until they known what they will be voting on.

"I will only vote to proceed to repeal legislation if I am confident there is a replacement plan that addresses my concerns," Sen. Shelley Moore Capito Shelley Wellons Moore CapitoSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure Hillicon Valley: Zuckerberg acknowledges failure to take down Kenosha military group despite warnings | Election officials push back against concerns over mail-in voting, drop boxes MORE (R-W.Va.) tweeted Tuesday.

Asked about those concerns, Cornyn told reporters, "Yeah, but it's a luxury we don't have."

Leaders are arguing that wavering senators should just vote to begin debate, and then the legislative process will work its way from there.

"You can't debate something that you don't initiate the debate on," Cornyn said, noting lawmakers could offer amendments on the floor.

"If anybody's got a better idea., they can offer that and get a vote on it, and in the end 50 people are going to decide whether we're going to have an outcome or not," he added. "Any three people can kill the bill at the end if they're not satisfied."

Sen. John Thune John Randolph ThuneWhat Senate Republicans have said about election-year Supreme Court vacancies The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE (R-S.D.), the No. 3 Republican, said that it will be up to Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellOcasio-Cortez to voters: Tell McConnell 'he is playing with fire' with Ginsburg's seat McConnell locks down key GOP votes in Supreme Court fight Video shows NYC subway station renamed after Ruth Bader Ginsburg MORE (R-Ky.) to decide what to vote on.

"It's a judgment call the leader will make at some point," Thune said.

- This story was updated at 3:03 p.m.