The Senate is expected to hold a procedural vote at 1 a.m. Monday on a three-week stopgap measure to reopen the government.

ADVERTISEMENT

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (R-Ky.) had warned earlier that he would force a procedural vote if senators could not reach an agreement. Absent a deal, 1 a.m. is the earliest the Senate would be able to hold such a vote.

Sen. Lindsey Graham Lindsey Olin GrahamMomentum growing among Republicans for Supreme Court vote before Election Day Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Warning signs flash for Lindsey Graham in South Carolina MORE (R-S.C.) said he thinks negotiators could be close to a breakthrough, but immigration issues are still a sticking point.

“I think there will be a breakthrough tonight. If there’s going to be one, it’s going to be tonight,” he told reporters. “We’re going to agree to fund the government through Feb. 8 with the understanding we’re going to work on all the outstanding issues, including immigration, which is a give for Mitch McConnell. And if we can’t find a resolution hopefully we’ll turn to immigration in an open process.”

Sen. Lisa Murkowski Lisa Ann MurkowskiMomentum growing among Republicans for Supreme Court vote before Election Day Collins: President elected Nov. 3 should fill Supreme Court vacancy Barrett seen as a front-runner for Trump Supreme Court pick MORE (R-Alaska) said discussions are ongoing under "a hard stop later this evening with a vote."

If the Senate passes the bill in the wee hours of Monday morning, the House could end up with a long night after waiting around all day Sunday.

House GOP leaders gave their rank-and-file a simple message in a brief conference meeting Sunday afternoon: Hang tight.

“Waiting on the Senate,” said House Armed Services Committee Chairman Mac Thornberry William (Mac) McClellan ThornberryTrump payroll-tax deferral for federal workers sparks backlash Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq Top Armed Services Republican 'dismayed' at Trump comments on military leaders MORE (R-Texas) with a shrug.

"We’re going to wait and see what the Senate does and when they do it and if they do something. And if they do, and we’re able to come back, we will basically come back immediately," said Rep. Chris Collins Christopher (Chris) Carl CollinsConspicuous by their absence from the Republican Convention NY Republican Chris Jacobs wins special election to replace Chris Collins 5 things to watch in Tuesday's primaries MORE (R-N.Y.).

The quick huddle showed the confidence among House Republicans in their position to hold out on negotiating on immigration until the government shutdown is ended.

"Our conference is united that we will not negotiate right now. Would we entertain an offer? We certainly will, and then we can say 'yes' or 'no,' " said Republican Study Committee Chairman Mark Walker Bradley (Mark) Mark WalkerMike Johnson to run for vice chairman of House GOP conference The Hill's Morning Report - Sponsored by National Industries for the Blind - Woodward book revelations rock Washington The Hill's 12:30 Report — Presented by Facebook — Trump, Biden duel in final stretch | Vaccine trial on pause after recipient's 'potentially unexplained illness' | Biden visits Michigan | Trump campaign has 18 events in 11 states planned in the next week MORE (R-N.C.).

— Updated 4:11 p.m.