The House on Thursday cleared a bipartisan Senate bill to fund most of the Department of Homeland Security, but the real battle is just beginning. Republicans are now turning to a far more contentious effort: securing three-year funding for Immigration and Customs Enforcement and Border Patrol through the reconciliation process, which would allow them to bypass a Senate filibuster.

The push comes after bipartisan talks on immigration enforcement reforms collapsed, fueled by tensions following a federal agent-involved shooting of two U.S. citizens in Minnesota. Republicans see reconciliation as the only viable path to lock in funding without Democratic concessions, but the road ahead is strewn with procedural land mines and internal party strife.

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The House adopted a Senate-crafted budget blueprint on Wednesday that outlines what the reconciliation bill should contain, officially starting the legislative machinery. However, translating that blueprint into a final bill that can reach President Trump's desk remains a daunting challenge, especially with a June 1 deadline imposed by Trump himself. He urged Republicans to stay 'FAST and FOCUSED,' but lawmakers are set to leave for recess next week, leaving barely a month to draft legislation and secure enough votes in both chambers.

House Budget Committee Chair Jodey Arrington (R-Texas) acknowledged the timeline is tight, telling reporters Monday that the process will take 'a few weeks,' but adding, 'We can’t wait until June 1. That’s what I can tell you.' The compressed schedule is just one headache for GOP leaders. In the Senate, the bill must undergo a 'Byrd bath,' where the parliamentarian can strip out provisions deemed extraneous or non-budgetary—a process that often inflames tensions among lawmakers eager to insert their own priorities.

In the House, Speaker Mike Johnson (R-La.) is navigating a razor-thin majority. He can afford no more than two Republican defections on any party-line vote, assuming all members are present and Democrats remain united in opposition. That leaves little room for error as he tries to balance the demands of hard-line conservatives and moderates. Rep. Kevin Kiley (I-Calif.), who voted present on the budget resolution, said his final vote 'will depend on the passage of meaningful reforms to immigration enforcement that are supported by the vast majority of Americans.'

Last year, Reps. Thomas Massie (R-Ky.) and Brian Fitzpatrick (R-Pa.) voted against the first reconciliation package—dubbed the One Big Beautiful Bill Act—underscoring the fragility of party unity. Rep. Kevin Hern (R-Okla.) told The Hill in March that passing a reconciliation bill this time around will likely be even harder. 'Just finding the conservative policies that are not so conservative, that you lose all the folks that are in swing seats, and if you get it not conservative enough, you can’t get enough of the conservatives in there that want to do as much as we can,' Hern said.

Despite the challenges, Johnson struck a confident tone in a press briefing on Thursday. 'We get a lot of people together, and we listen to their concerns, and we try to get the disparate priorities handled,' he said. 'I’ve never asked a colleague in the Republican party ever to violate a core principle, but sometimes we have to give up on our preferences because we are in a large body … So, it takes a long time to work through that and get people to consensus, but we do that patiently. We do as we must, and we ultimately deliver. Don’t doubt the House Republican majority. We always deliver for the American people.'

He added earlier, 'We will finish the work and finally get—again for three years with no crazy Democrat reforms—we will fund border patrol and immigration enforcement as soon as we return for the work session when that bill is finalized.'

The reconciliation fight is unfolding against a backdrop of broader immigration debates, including proposals like the Bipartisan Dignity Act, which has drawn fire from both the right and left. Meanwhile, the Supreme Court's recent landmark voting rights ruling striking down Louisiana's majority-Black district has also reshaped political dynamics in the region. As the clock ticks, all eyes are on whether House GOP leaders can bridge their internal divides and deliver on Trump's deadline.