A $1.8tn spending offer proposed to the White House in late 2021 by Senator Joe Manchin appears to be off the table, following another breakdown in talks between the moderate Democrat from West Virginia and the Biden White House, the Washington Post reported on Saturday.

Manchin told reporters this week he is no longer involved in discussions with the White House and has signaled privately that he is not interested in approving any legislation like Joe Biden’s Build Back Better Package, the newspaper said, citing three people with knowledge of the matter.

Manchin’s office did not immediately respond to a request for comment.

The legislation is one of Biden’s signature domestic priorities. Manchin’s vote is critical in the evenly divided Senate. In December, his opposition torpedoed Build Back Better, drawing ire from progressives and sending the party scrambling to find a way to resurrect the package.

Biden’s plan includes funding for high-priority issues for many Americans, including free pre-school, support for childcare costs, coverage of home-care costs for the elderly and expansion of free school meals. It also seeks to fund measures to combat the climate crisis.

Manchin has spoken with officials and others seeking to garner his support, the Post said, among them the senior White House aide Steve Ricchetti; a former economic adviser to Donald Trump, Larry Kudlow; and the Republican senator Mitt Romney, of Utah.

Manchin is the only Democrat in major elected office in West Virginia. Attempts to secure his support for Build Back Better have been dogged by fears he could quit the party, either to sit as an independent or to switch to the Republicans, thereby tipping the Senate to the GOP.