WATCH LIVE: Senate expected to vote on Republican proposal to fund TSA, DHS

WASHINGTON (AP) — With pressure mounting, senators moved quicklyPresident Donald Trump said Thursday he would sign an order instructing the Homeland Security secretary to debateimmediately pay Transportation Security Administration agents as Congress struggled to reach a "last and final" offerdeal to end the fundinga budget impasse that has jammed airports and put the livelihoods of Transportation Security Administrationleft workers in jeopardy as Republicans try to address Democratic demands for changes to President Donald Trump's immigration enforcement changeswithout paychecks. The Senate meets at 12 p.m. EDT. Watch live in our video player above. A test vote was failingTrump announced his decision in a social media post saying he wanted to advance an earlier proposal asquickly stop the new approach appeared"Chaos at the Airports." "It is not an easy thing to be taking shape behind closed doorsdo, but I am going to do it!" the president posted. WATCH: Trump says in Cabinet meeting he doesn't 'know if we're willing' to make a deal with Iran With pressure mounting, the White House had floated the extraordinary move of invoking a national emergency to pay TSA agents, while senators were reviewing a "Enoughlast and final" offer from Republicans to Democrats to end the funding impasse at the Department of Homeland Security. Democrats have been refusing to fund the Homeland Security as they demand changes to rein in Trump's immigration enforcement operations. The Senate came to a standstill and senators, ready to leave town for their own spring break, had prepared to stay all night to reach a deal. "The president is enoughdoing absolutely the right thing," said Senate Majority LeaderSen. John ThuneBarrasso, R-SWyo.D., as he announced he had given the final offerGOP whip. "The TSA agents are going to the Democratsbe paid. Thune did not disclose details" Sen. Susan Collins, R-Maine, the chairwoman of the new frameworkAppropriations Committee, but hehas said there was funding elsewhere that it picked up on what had beencan be legally used to pay TSA as well as the Republican offer over the weekendCoast Guard, before talks with the White House and Democrats had broken offwithout declaring a national emergency. "Hopefully ... there will be some finality in this real soon," Thune said. WATCH: Where talks to fund DHS stand as shutdown reaches 40 days The shutdown of funding for the Department of Homeland Securityshutdown, now in its 41st day, has resulted in travel disruptionsdelays, missed paychecks and even warnings of airport closures. TSA workers are coming up on their second missed payday Friday, but lawmakers have yetwith thousands refusing to resolve the underlying issueshow up for work. Multiple airports are experiencing greater than 40% callout rates of reining in immigrationTSA workers and mass deportation operations. Democrats argue the GOP proposalsnearly 500 of its nearly 50,000 transportation security officers have not gone far enough at putting guardrailsnow quit during the shutdown. Nationwide on officers from ICEWednesday, Customs and Border Protection and other federal agencies who are engaged in the immigration sweeps, particularly after the deathsmore than 11% of two Americans protesting the actions in MinneapolisTSA employees on the schedule missed work, according to DHS. That is more than 3,120 callouts. Trump, who has largely left the issue to Congress to resolve, threatenedhad warned he was ready to take action, even threatening to send the National Guard to airports, in addition to his deployment of ICE agents who are now checking travelers' IDs — a development drawing concerns. The White House has been considering a menu of options. "They need to end this shutdown immediately or we'll have to take drastic measures," Trump said Thursday during a morning Cabinet meeting at the White House. With Congress set to leave town by week's end for its spring break, calls are intensifying for an end to the stalemate that has left TSA officers unpaid and many not showing up for work. Multiple airports are experiencing greater than 40% callout rates of TSA workers and nearly 500 of its nearly 50,000 transportation security officers have now quit during the shutdown. Nationwide on Wednesday, more than 11% of the TSA employees on the schedule missed work, according to DHS. That is more than 3,120 callouts. WATCH: TSA, Coast Guard, FEMA leaders testify on effects of partial government shutdown At George Bush Intercontinental Airport in Houston some travelers reported missing flights after spending hours in security lines. , Melissa Gates said she would not make her flight to Baton Rouge, Louisiana, after waiting more than 2½ hours and still not reaching the security checkpoint. She said no other flights were available until Friday. "I should have just driven, right?" Gates said of her 260-mile (418-kilometer) trip. "Five hours would have been hilarious next to this." A 'last and final' offer on the table Senators retreated to privately discussEarlier Thursday, Senate Majority Leader John Thune, R-S.D., announced he had given the latestfinal offer as a core groupto the Democrats. Thune did not disclose details of more than 10 senatorsthe new framework, Democrats and Republicansbut he said that it picked up on what had been the Republican offer over the weekend, worked to hammer outbefore talks with the detailsWhite House and Democrats had broken off. More voting was possible. "I think we all realize we're not going anywhere until thisEnough is doneenough," he said Sen. Mark Warner But as senators retreated to privately discuss the new plan, D-Vathe action stalled out. Earlier this week,Democrats argue the GOP offer added a new restraintproposals have not gone far enough at putting guardrails on immigration officers from ICE, fundingCustoms and Border Protection and other federal agencies who are engaged in the useimmigration sweeps, particularly after the deaths of body cameras that had previously been agreed totwo Americans protesting the actions in Minneapolis. It excluded other policies that Democrats have demanded, such as that They want federal agents to wear identification, remove their face masks and refrain from conducting raids around schools, churches or other sensitive places. Thune indicated the new proposal picked up where earlier negotiations broke off. Over the weekend, talks with the White House, including with border czar Tom Homan, appeared to be making progress toward a deal. The White House had presented its own offer with several items Democrats had been demandinghave also pushed for an end of administrative warrants, including officer IDs and traininginsisting that judges sign off before agents search people's homes or private spaces. Senate Democratic leader Chuck Schumer of New York said they needed to see real changes. "We've been talking about ICE reforms from day one," he said. Any deal will almost certainly need to involvedinvolve a compromise as lawmakers on the left and right flanks revolt. Conservative Republicans have panned their own GOP proposals, demanding full funding for immigration operations and skeptical of the promise from leaders that they would address Trump's proof-of-citizenship voting bill in a subsequent legislative package. Trump stays out of the fray The Republican president initially signed off on one plan the GOP senators brought to him late Monday. By Tuesday, he said he would not be happy with any deal. Trump did not directly address the status of negotiations late Wednesday evening during an annual fundraising dinner for the House Republicans' campaign committee as Speaker Mike Johnson, R-La., works said after a private lunch meeting that there were other options to keep majority control inshift money than invoking the November electionsnational emergency. On Thursday, the president revived his campaign for senators to end the filibuster as a way to overpower opposition to GOP policies, something most Republican senators do not want to do. The GOP's big tax cuts bill that Trump signed into law last year funneled billions to DHS, including $75 billion for ICE operations, ensuring the money is flowing for his immigration and deportation agenda even with the funding shutdown. ICE and other immigration officers are still being paid. Republicans say the Trump administration has already made strides to meet Democrats' demands, particularly after swearing in former Oklahoma Sen. Markwayne Mullin as the new homeland security secretary to replace Kristi Noem. He has given a nod to the need for the judicial warrants for searches. Airport lines grow as TSA workers endure hardships Lines and wait times are expected to grow Thursday and Friday at George Bush Intercontinental Airport in Houston because of "significantly higher passenger traffic," according to an update on the airport's website. "This is a dire situation," the acting TSA administrator, Ha Nguyen McNeill, testified at a House hearing Wednesday. She described the multiple hardships facing unpaid TSA workers — piling up bills and eviction notices, even plasma donations to make ends meet — and warned of potential airport closures if more employees refuse to come to work. WATCH: TSA, Coast Guard, FEMA leaders testify on effects of partial government shutdown "At this point, we have to look at all options on the table," she said. McNeil also said TSA officers working at the nation's airports have experienced a more than 500% increase in the frequency of assaults since the shutdown began. "This is unacceptable," McNeill said. Associated Press writers Joey Cappelletti, Mary Clare JalonickKevin Freking, Rebecca Santana and Ben Finley in Washington, Lekan Oyekanmi in Houston, Wyatte Grantham-Philips in New York, Rio Yamat in Las Vegas, Russ Bynum in Savannah, Georgia, and Gabriela Aoun Angueira in San Diego contributed to this report. A free press is a cornerstone of a healthy democracy. Support trusted journalism and civil dialogue.