Forty-three House Republicans on Thursday endorsed legislation that would keep the government open while defunding ObamaCare.

The sponsorship total reveals that there is a significant bloc of opposition to a plan from GOP leaders that would avoid a government shutdown by requiring that the Senate take a vote on the healthcare law.

Conservatives decried that plan as a “gimmick,” forcing House Majority Leader Eric Cantor (R-Va.) and his team to push back a vote until at least next week.

The new measure from Rep. Tom Graves (R-Ga.) gives House conservatives the hardline approach they have been seeking by tying the extension of basic government funding to a one-year delay in ObamaCare.

It comes just two days after House GOP leadership pitched to their conference a gambit that would require the Senate to vote on a bill defunding ObamaCare before passing a continuing resolution (CR) on government spending.