Speaker Mike Johnson said Tuesday he is unsure if the House will have full attendance on Wednesday -- the earliest day the chamber would vote on the Trump policy bill -- due to the weather and members’ flights being canceled.

“We’re monitoring the weather closely,” he said. “We have to figure that out.”

Johnson said there are “a lot of delays” in lawmakers returning, adding, “so that’s part of the problem.”

The speaker needs all the votes he can get considering his razor-thin majority, so attendance issues could play a huge role in getting the bill across the finish line. The House is slated to convene Wednesday morning at 9 a.m for legislative business. Consideration of HR 1 will then occur, but there are several procedural hurdles Republicans must overcome to vote on final passage.

Ground stops and ground delays were in place Tuesday evening from Charlotte to Boston and in Las Vegas and Denver because of storms. As of 6 p.m. ET, 1,257 flights have been cancelled nationwide. Washington’s Reagan National, New York’s LaGuardia and DCA, LGA and Newark Liberty were the hardest hit.

-ABC News’ Lauren Peller and Sam Sweeney

Trump posted Tuesday evening on his social media platform that Israel has agreed to "necessary conditions" to finalize a 60-day ceasefire with Hamas.

Trump said "we will work with all parties to end the War" during the cease-fire.

Representatives from Qatar and Egypt will deliver the proposal, Trump said.

"I hope, for the good of the Middle East, that Hamas takes this Deal, because it will not get better — IT WILL ONLY GET WORSE," he said in the post.

As House members scramble to make their way back to the Capitol to vote on the Senate-passed Trump policy megabill, several have said their flights were canceled due to inclement weather -- which could create an attendance problem when the measure comes up for a final vote as early as Wednesday.

Wisconsin Democrat Mark Pocan posted a video on X: a video on X: “Hi, I am at the airport in Madison and my flight just got canceled due to thunderstorms going to D.C. So, I am driving to Chicago hoping to get one of the first flights 6 a.m. tomorrow. This is part of the glamorous life of Congress.”

Illinois Democrat Raja Krishnamoorthi said he’s hosting a pop-up Zoom town hall from his car as he drives to D.C. since his flight was canceled. “My flight was canceled, so I’m hosting a pop-up Zoom town hall from the car as I drive to D.C. to vote NO on Trump’s “Large Lousy Law,” a budget that guts Medicaid & slashes our safety net to fund tax cuts for the wealthiest,” he said in a post on X.

South Carolina Republican Nancy Mace said in a post on X: “Both my flights to DC, one for tonight and one for early tomorrow morning have been canceled by the airline. sigh Scrambling to find a way to get to DC in time to vote for the Big Beautiful Bill.”

Her fellow South Carolina Republican Russell Fry posted a video on X of him in the car heading back to D.C.

“I am not going to chance being stuck in Myrtle Beach for this historic opportunity,” he said. I am getting in the car right now. We are just leaving town and we are gonna drive all the way through until we get to Washington, DC tonight. The moment is too important to sit around and wait in an airport. Let’s go deliver on President Trump’s agenda… I am going to have one big, beautiful road trip,” he said.

-ABC News’ Lauren Peller and Lalee Ibssa

The White House confirmed Tuesday that it has stopped the shipment of some air defense and precision guided weapons that were on track to be sent to Ukraine.

Officials said the decision followed an assessment of U.S. stockpiles.

“This decision was made to put America’s interests first following a [Department of Defense] review of our nation’s military support and assistance to other countries across the globe,” White House spokesperson Anna Kelly said in a statement sent to reporters.

“The strength of the United States Armed Forces remains unquestioned -- just ask Iran,” she added.

Politico first reported the decision. It was not immediately clear whether other shipments of weapons would be released and how much was paused.

-ABC News’ Kelsey Walsh, Molly Nagle and Anne Flaherty