WASHINGTON (AP) — Travel disruptions deepened Tuesday as senators raced to salvage a proposal to end the Homeland Security shutdown by funding much of the department, including airport workers going without pay, but excluding immigration operations that have been core to the dispute.

The sudden sense of urgency comes as U.S. airports are snarled by long security lines, with travelers being told to arrive hours before their flights in Houston, Atlanta and Baltimore/Washington International. Routine Department of Homeland Security funding was halted in mid-February ahead of the busy spring travel season. Nearly 11% of Transportation Security Administration workers who were scheduled to report for duty Monday — more than 3,200 — missed work, and at least 458 have quit altogether since the shutdown began, according to DHS.

Democrats are refusing to fund the department without restraints on Trump’s immigration enforcement and mass deportation operations after federal agents killed two citizens in Minneapolis.

“The time to end this is now,” said Senate Majority Leader John Thune, R-S.D.

But Democrats panned the offer as insufficient. And President Donald Trump himself was noncommittal.

“I think any deal they make, I’m pretty much not happy with it,” Trump said at an event at the White House swearing in his new Homeland Security Secretary Markwayne Mullin.

Airport conditions have become increasingly unpredictable with swelling crowds seen in major hubs. Travelers headed to LaGuardia and John F. Kennedy airports in New York — as well as Newark Liberty International in neighboring New Jersey — still couldn’t check online TSA wait times Tuesday morning.

Immigration and Customs Enforcement agents were spotted in terminals, including at Philadelphia International Airport, where a protester was seen at one of the checkpoints holding a sign criticizing ICE. In Houston, passengers at George Bush Intercontinental Airport spent hours Tuesday navigating meandering security lines that twisted and turned across multiple floors.

Acting TSA administrator Ha McNeil said multiple airports are experiencing greater than 40% call out rates, according to prepared remarks she will give Wednesday to the House Committee on Homeland Security.

She is also expected to tell lawmakers of the personal toll the shutdown has had on TSA workers who “are running out of options to keep a roof over their head and put food on the table.”

The contours of the deal emerged once a group of Republican senators met with Trump at the White House late Monday, after he upended talks and deployed federal immigration officers at certain airport security checkpoints — a move some lawmakers warned could lead to heightened tensions.

The proposal would fund most of Homeland Security, but not one main part of ICE — the enforcement and removal operations that are core to Trump’s deportation agenda.

Under the plan, ICE’s Homeland Security Investigations would be funded as well as Customs and Border Protection, and it would include funding for officers to wear body cameras, but few other restraints.

The proposal was not substantially different from one the two sides had already agreed on before the deaths sparked demands for more changes, according to a person granted anonymity to discuss the details, which have not been publicly released.

For example, there was no mandate that immigration officers wear identification or other changes the White House had floated earlier in talks, including a ban on immigration enforcement at schools, churches, hospitals and other sensitive places, the person said.

While the ICE officers manning airports are going without face-covering masks, the Democratic demand that they go unmasked during immigration operations does not appear to be part of the deal.

“We need strong, strong reforms and we need to rein in ICE,” said Senate Democratic Leader Chuck Schumer.

Since so much of ICE is already funded through Trump’s big tax breaks bill, immigration officers are still receiving paychecks despite the shutdown.

Congress is controlled by the Republican president’s party, and House Democratic Leader Hakeem Jeffries said his party members insist on “bold” changes to ICE.