Rep. Mark Walker (R-N.C.), head of the 172-member committee, said Monday his opposition stems from the draft bill's use of refundable tax credits.

The chairman of the influential Republican Study Committee said Monday he would vote against a draft ObamaCare replacement bill that leaked last week.

"There are serious problems with what appears to be our current path to repeal and replace Obamacare. The draft legislation, which was leaked last week, risks continuing major Obamacare entitlement expansions and delays any reforms," Walker said in a statement Monday.

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"It kicks the can down the road in the hope that a future Congress will have the political will and fiscal discipline to reduce spending that this Congress apparently lacks. Worse still," Walker continued, "the bill contains what increasingly appears to be a new health insurance entitlement with a Republican stamp on it."

He later told reporters the committee would have a hard time getting behind the draft as written. "Provide us with more information. We're willing to engage, but where it sits right now, off this leaked plan ... as it stands right now, our members would have a tough time getting there," he said.

Walker said he could not "in good conscience" recommend Study Committee members vote for the draft.

Walker became the second top Republican to come out against the draft bill Monday. Rep. Mark Meadows (R-N.C.), chair of the conservative Freedom Caucus, also said he would vote against the measure as drafted.

He first voiced his opposition to the tax credits, which he called an "entitlement program." "I'm opposed to refundable tax credits in the way the current draft, as I understand it, lays it out because it actually increases — provides for a new entitlement program," he told reporters Monday. "That plan that was reported on ... has a number of issues that would make it impossible for me to vote for."

He voiced his opposition to the tax credits, which he called an "entitlement program," in an interview with CNN