Bipartisan negotiations to arrive at a consensus on gun background checks have crumbled from Sen. Chuck Schumer’s (D-N.Y.) insistence that checks and records kept by authorities on gun sales extend to all private sales, even between family members.

Schumer will reportedly push forward with his own plan at a Senate Judiciary Committee hearing Thursday.

Sens. Joe Manchin (D-W.Va.) and Mark Kirk (R-Ill.), who have been leaders in an effort to forge some sort of bipartisan consensus, issued a joint statement saying they won’t back Schumer’s bill.

“We are committed to continuing to work in a bipartisan effort with Senators Schumer, Coburn and others in order to find a commonsense solution for enhanced background checks, however, Senator Schumer’s current proposal is one we cannot support as it stands today,” Manchin and Kirk said. “Our goal is to pass a bill that will close loopholes in the current background check process in a way that does not burden law-abiding citizens. Any bill we support will guarantee that Americans’ Second Amendment rights are clearly protected. We simply want to make sure firearms do not end up in the hands of convicted criminals or people who are deemed mentally unstable by court ruling.”

“While the bill Senator Schumer introduced today doesn’t meet this standard, we will continue to work with Senator Schumer, Senator Coburn and other colleagues to find a commonsense compromise,” they added.