Three GOP senators are adding an extra hurdle to the looming fight over nixing the Affordable Care Act, arguing they want a "full repeal" of ObamaCare.

Sens. 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 (Ky.), Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE (Texas) and Mike Lee Michael (Mike) Shumway LeeMcConnell shores up GOP support for coronavirus package McConnell tries to unify GOP Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE (Utah) each pointed to the Senate's 2015 repeal bill as the "bare minimum" for the 2017 repeal legislation.

"2 yrs ago, the GOP Congress voted to repeal Obamacare. That 2015 repeal language should be the floor, the bare minimum," they each tweeted, along with the hashtag "FullRepeal."

2 yrs ago, the GOP Congress voted to repeal Obamacare. That 2015 repeal language should be the floor, the bare minimum. #FullRepeal — Ted Cruz (@tedcruz) February 28, 2017

The tweets come after the conservative House Freedom Caucus voted to oppose an ObamaCare repeal bill if it does not go as far as the repeal measure that passed in 2015.

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Conservatives have been pushing for the 2015 repeal bill, which kills the core elements of the law including its subsidies, taxes, mandates and Medicaid expansion, to be brought up again.

Paul — who has warned about only partially repealing the Affordable Care Act — went further, adding on Twitter that GOP lawmakers shouldn't settle for "ObamaCare lite."

Their tweets come after a draft House GOP plan was leaked late last week.

The bill would dismantle core aspects of the healthcare law and replace them with a system centered on a new tax credit. If three GOP senators were to vote against the bill it would effectively sink it's chances of clearing through Congress.

Rep. Mark Meadows (R-N.C.) appeared to take a shot at the plan on Twitter, noting that without "substantial" changes he couldn't support it.

"There is nothing conservative about a plan that ultimately amounts to a new entitlement program and a new tax increase," he said.

The leaked document would eliminate subsidies for people to obtain coverage and also phase out federal funds for states to expand Medicaid in 2020. It also includes a tax credit ranging from $2,000 to $4,000 that would increase based on a person's age to help recipients afford insurance.

Meadows joined in on the Senate tweet storm, noting he supports Cruz, Lee and Paul.

"Every tax, every mandate, every regulation of #Obamacare needs to go," the Freedom Caucus chairman tweeted.

If Cruz, Lee and Paul refuse to vote for anything short of the 2015 bill, that could add a fatal hurdle to passing ObamaCare repeal, as Republicans can only afford to lose two senators to get the legislation through the Senate.

Senate Minority Leader Charles Schumer Chuck SchumerMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security Warren, Schumer introduce plan for next president to cancel ,000 in student debt Schumer lashes out at Trump over 'blue states' remark: 'What a disgrace' MORE (D-N.Y.) predicted earlier on Monday that Republicans could fail to repeal ObamaCare because of divisions on defunding Planned Parenthood and Medicaid expansion.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMcConnell focuses on confirming judicial nominees with COVID-19 talks stalled McConnell accuses Democrats of sowing division by 'downplaying progress' on election security Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (R-Ky.) predicted that the Senate's repeal effort would be similar to the 2015 bill.