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 John BoehnerJohn Andrew BoehnerThe two-party system is dying — let’s put it out of its misery One year later, neither party can get past last year's election White House strikes back at Bushes over legacy 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.