Senate negotiators on Sunday unveiled the long-sought bipartisan deal to secure the U.S.-Mexico border that is also intended to unlock aid to Ukraine in its war against Russia. 

The 370-page bill came together after months of negotiations led by Sens. James Lankford (R-Okla.), Chris Murphy (D-Conn.) and Kyrsten Sinema (I-Ariz.). 

The deal includes provisions to raise standards for asylum screening and to process claims faster, ends the practice known as “catch and release,” and provides a new authority to close the border when crossings reach a set threshold.

The full supplemental — which includes funds for the border, Israel and Ukraine aid, and other foreign policy priorities — totals $118 billion, with about $20 billion going to the border component.

Lankford called it “a once-in-a-generation opportunity to close our open border and give future administrations the effective tools they need to stop the border chaos and protect our nation.”

Senate Majority Leader Chuck Schumer (D-N.Y.) said he would bring it to the floor this week.

In a statement Sunday, he lauded the bill as “a monumental step towards strengthening America’s national security abroad and along our borders.”

“This is one of the most necessary and important pieces of legislation Congress has put forward in years to ensure America’s future prosperity and security,” he added.

Republicans have said since the outset of talks that the goal of a bill would be to lessen the flow of migrants into the country. In December alone, there were more than 300,000 migrant crossings, blowing past the 240,000 crossings recorded in each of the past four months. 

“There is a crisis at our border, and our bipartisan border security package fixes it. Now, senators must make a decision: pass our package and solve the crisis or accept the status quo, do nothing, and keep playing politics while our system breaks and our communities continue to suffer. I choose to secure the border, protect Arizona border communities, fix our broken system, and finally solve the border crisis,” Sinema said.

Republicans demanded policy changes at the border as a condition of sending more aid to Ukraine, an idea Speaker Mike Johnson (R-La.) backed. Attempts to shepherd that aid through before the government funding deadline in September failed.

It’s unclear how much Republican support the deal will pick up in the Senate, where it needs GOP votes to advance.

Conservatives wasted to time panning the proposal.

“No self-respecting senator should agree to vote on this 370-page bill this week,” Sen. Mike Lee (R-Utah) wrote on X, the platform formerly known as Twitter. “Any 41 senators can prevent the bill from proceeding. If you agree that senators should have this bill for at least a few weeks (and certainly more than a few days) before voting on it, say so!”

Progressive Democrats could also vote against the measure.

But the biggest question now is whether the bipartisan Senate bill would be taken up in the GOP-controlled House.

House Republicans for months have been vocal in support of H.R. 2, their partisan bill that did not get a single Democratic vote in May, and have maintained that it is the starting position for their conference. 

Johnson himself has said the bill is as good as “dead on arrival” in the lower chamber, and recently argued that the border can’t be fully secured unless a Republican president is elected in November. 

Opponents of Ukraine aid have also been calling on Johnson to not put the bill on the floor.

Adding to the headwinds for the bill is former President Trump, who recently called on lawmakers to sidestep the emerging border deal and does not want to give Biden a potential legislative and political victory with the agreement.

“I do not think we should do a Border Deal, at all, unless we get EVERYTHING needed to shut down the INVASION of Millions & Millions of people, many from parts unknown, into our once great, but soon to be great again, Country!” Trump said on TruthSocial. “Also, I have no doubt that our wonderful Speaker of the House, Mike Johnson, will only make a deal that is PERFECT ON THE BORDER. Remember, without Strong Borders and Honest Elections, we don’t have a Country!!!”

Lankford has argued that the bipartisan bill would hand Trump tools to manage the border that he did not have at his disposal during his presidency, but that does not seem to have assuaged him. The Oklahoma Republican told reporters last week that he has not talked to the former president in months.

Lankford has repeatedly expressed exasperation at some Republicans in recent weeks, indicating he is frustrated at them for repeatedly saying that action is needed at the border but refusing to jump on board with his push out of political expediency for Trump. 

“It is interesting ― Republicans four months ago would not give funding for Ukraine, for Israel and for our southern border because we demanded changes in policy. So we actually locked arms together and said, ‘We’re not going to give you money for this. We want a change in law,’” Lankford said during a rece Sunday show appearance. “And now it’s interesting, a few months later, when we’re finally getting to the end, they’re like, ‘Oh, just kidding. I actually don’t want a change in law because it’s a presidential election year.’”

The White House, meanwhile, has been clamoring for a deal in order to help Ukraine as Russia’s invasion is set to hit the 2-year mark in the coming weeks. 

Biden has issues on his own flank, though, as Hispanics and progressives have chafed at not having a seat at the table in talks and are concerned that the asylum and parole restrictions will be too much for them to swallow. 

Updated at 6:57 p.m.