Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (R-Ky.) said Republicans will try to move forward with their plan to repeal ObamaCare next week, even as they appear short of the needed votes to pass the proposal.

“For the information of all senators, at the request of the President [Trump] and Vice President [Pence] and after consulting with our members, we will have the vote on the motion to proceed to the ObamaCare repeal bill early next week," McConnell said from the Senate floor on Tuesday night.

The Senate is expected to vote on whether or not to take up the House-passed healthcare bill, which is being used for any action in the upper chamber. If they are successful, McConnell would offer the ObamaCare repeal proposal as an amendment to that legislation.

But the push to vote comes as GOP leadership appears short of the simple majority needed to even open debate on a healthcare bill — much less repeal ObamaCare.

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With a slim 52-seat majority, McConnell can only afford to lose two GOP senators and still let Vice President Pence break a tie.

GOP Sens. Susan Collins Susan Margaret CollinsJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally Momentum growing among Republicans for Supreme Court vote before Election Day MORE (Maine), Lisa Murkowski Lisa Ann MurkowskiMomentum growing among Republicans for Supreme Court vote before Election Day Collins: President elected Nov. 3 should fill Supreme Court vacancy Barrett seen as a front-runner for Trump Supreme Court pick MORE (Alaska) and 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 (W.Va.) are expected to vote "no" on proceeding to the House healthcare bill.

Sen. Rob Portman Robert (Rob) Jones PortmanRomney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery House passes B bill to boost Postal Service MORE (R-Ohio) separately told reporters on a conference call that it wasn't "appropriate" to repeal ObamaCare without a replacement, though he has not said if he will vote against taking up the House bill.

It is also unclear if Sen. John McCain John Sidney McCainMomentum growing among Republicans for Supreme Court vote before Election Day McConnell urges GOP senators to 'keep your powder dry' on Supreme Court vacancy McSally says current Senate should vote on Trump nominee MORE (R-Ariz.), who is recovering from a surgery, will return to Washington in time.

Senators are slated to visit the White House on Wednesday for lunch with Trump, where healthcare will likely be a key topic of discussion.

Conservatives and leadership have stressed that eventually they need to hold a vote, even if it failed.

“At some point we need to find out where the votes are,” Sen. Roy Blunt (R-Mo.), a member of GOP leadership, acknowledged to reporters.

McConnell suggested after a closed-door GOP lunch on Tuesday that he is prepared to move forward with a vote even if the procedural motion fails on the floor, since it would at least show the public — and the White House — where the bill stands.

The Senate previously passed an ObamaCare repeal bill in 2015 with only Collins and then-Sen. Mark Kirk Mark Steven KirkLiberal veterans group urges Biden to name Duckworth VP On the Trail: Senate GOP hopefuls tie themselves to Trump Biden campaign releases video to explain 'what really happened in Ukraine' MORE (R-Ill.) voting against the measure.

Conservatives have ripped their moderate colleagues for refusing to go forward now despite their previous support — which came when they knew then-President Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE would veto the bill.

“If you're not willing to vote the same way you voted in 2015, then you need to go back home and you need to explain to Republicans why you're no longer for repealing ObamaCare,” said Sen. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.).

The 2015 measure guts ObamaCare by repealing authority for the federal government to run healthcare exchanges and scrapping subsidies aimed at helping people afford plans bought through those exchanges. It zeros out the penalties on individuals who do not buy insurance and employers who do not offer health insurance.

Repealing portions of ObamaCare without enacting a replacement could leave 18 million people without health insurance the following year, according to a Congressional Budget Office (CBO) analysis released in January.

The CBO also found that 32 million people would become uninsured by 2026 after the elimination of ObamaCare's Medicaid expansion and insurance subsidies.

Updated: 7:05 p.m.