The White House is set to release President Donald Trump’s 2027 budget on Friday, a sweeping blueprint that could boost Pentagon spending to USD 1.5 trillion, the largest of its kind in decades, as the US focuses on military investments rather than other domestic programs.Even before the US-led war against Iran, the Republican president had indicated he wanted to bolster defence spending to modernise the military for 21st-century threats. Separately, the Pentagon last month proposed USD200 billion for the war effort and to backfill munitions and supplies.Trump, speaking ahead of an address to the nation this week about the Iran war, signaled the military was his priority, setting up a clash ahead in Congress.“We’re fighting wars. We can’t take care of day care,” Trump said at a private White House event on Wednesday.“It’s not possible for us to take care of day care, Medicaid, Medicare — all these individual things,” he said. “They can do it on a state basis. You can’t do it on a federal.”The president’s annual budget more broadly is considered a reflection of the administration’s values and does not carry the force of law. The massive document typically highlights an administration’s priorities, but Congress, which handles federal spending issues, is free to reject it and often does.With the nation running nearly USD 2 trillion annual deficits and the debt swelling past USD 39 trillion, the federal balance sheets have long been operating in the red.About two-thirds of the nation’s estimated USD 7 trillion in annual spending covers the Medicare and Medicaid health care programs, as well as Social Security income, which are essentially growing — along with an aging population — on autopilot.The rest of the annual budget has typically been more evenly split between defence and domestic accounts, nearly USD 1 trillion each, which is where much of the debate in Congress takes place.The GOP’s big tax breaks bill that Trump signed into law last year boosted his priorities beyond the budget process — with at least USD150 billion for the Pentagon over the next several years, and USD 170 billion for Trump’s immigration and deportation operations at the Department of Homeland Security.This year’s White House document, prepared by Budget Director Russ Vought, is intended to provide a road map from the president to Congress as lawmakers build their own budgets and annual appropriations bills to keep the government funded. Vought spoke to House GOP lawmakers on a private call Thursday.Congress still fighting over 2026 spendingThe president’s budget arrives as the House and Senate remain tangled over current-year spending and stalemated over DHS funding, with Democrats demanding changes to Trump’s immigration enforcement regime that Republicans are unwilling to accept.Trump announced Thursday he would sign an executive order to pay all DHS workers who have gone without paychecks during the record-long partial government shutdown that has reached 49 days. The Republican leadership in Congress reached an agreement this week on a path forward to fund the department, but lawmakers are away on spring break and have not yet voted on any new legislation.Last year, in the president’s first budget since returning to the White House, Trump sought to fulfill his promise to vastly reduce the size and scope of the federal government, reflecting the efforts of billionaire Elon Musk’s Department of Government Efficiency.As DOGE slashed through federal offices and Vought sought to claw back funds, Congress did not always agree.For example, Trump sought a roughly one-fifth decrease in non-defence spending for the current budget year ending September 30, but Congress kept such spending relatively flat.Some of the programs that Trump tried to eliminate entirely, such as assisting families with their energy costs, got a slight uptick in funding. Others got flat funding, such as the Community Development Block Grants that states and local communities use to fund an array of projects intended mostly to help low-income communities through new parks, sewer systems and affordable housing.Lawmakers have also focused on ensuring the administration spends federal dollars as directed by Congress. This year’s spending bills contained what Sen. Patty Murray, the ranking Democratic member of the Senate Appropriations Committee, described as “hundreds upon hundreds of specific funding levels and directives” that the administration is required to follow.