Lawmakers need to reach an agreement by midnight on legislation to fund the government otherwise it will shutdown.

Over the weekend, the House passed a continuing resolution that would fund the government through Dec. 15. It would delay the individual coverage mandate and the insurance exchanges — which are set to launch on Tuesday — and eliminate a 2.3 percent tax on medical devices.

But Democrats have said they want a “clean” CR to prevent a shutdown. Earlier Monday, the Senate voted again to remove House language designed to delay ObamaCare.

McCaskill said BoehnerJohn Andrew BoehnerGOP revolts multiply against retiring Ryan Can Jim Jordan become top House Republican? Tensions on immigration erupt in the House GOP MORE should allow the House to vote on the Senate’s version, but said he doesn’t because he knows it would pass. 

Boehner has vowed to follow the “Hastert rule” named after former Speaker Denny Hastert (R-Ill.), who promised not to hold a vote on any piece of legislation unless it had a majority of support from his party.

“I’ve searched the Constitution and the Hastert rule isn’t in there,” McCaskill said. “I implore you Speaker Boehner to let the people vote on the Senate resolution if you think it will be struck down. … I’ll bet you a cup of coffee that it won’t be.”

House Republicans are expected to try again Monday evening to insert language on ObamaCare into the CR.