Washington DC [US]: The US House of Representatives on Wednesday narrowly passed a sweeping USD 1.15 trillion defence policy bill, largely along party lines, handing a political win to US President Donald Trump while deepening partisan divisions over his administration's defence priorities and Iran policy, Politico reported.

According to Politico, the annual National Defense Authorization Act (NDAA) was approved in a 216-212 vote, with only six Democrats supporting the legislation. Their votes helped Republicans overcome opposition from seven members of their own party.

The passage of the bill marked a victory for Trump and US House Speaker Mike Johnson, who managed to steer the legislation through despite divisions within the Republican ranks.

However, the inclusion of several conservative provisions reduced the likelihood of broad bipartisan support, Politico reported.

The bill includes a series of Republican-backed measures, including a proposal to rename the US Department of Defense as the US Department of War, restrictions on coverage for gender-affirming care and provisions aimed at making it easier for service members to carry personal firearms on military bases.

Republican leaders also added Trump's election-related proposal, the SAVE America Act, to the defence bill following demands from hard-line members who had earlier blocked the legislation, Politico reported.

The traditionally bipartisan defence legislation faced opposition from Democrats, who raised concerns over Trump's handling of the war against Iran, military operations abroad, deployment of National Guard troops to US cities and other administration policies.

A compromise version of the bill is unlikely before the midterm elections, as the House-passed legislation is expected to face challenges in the Senate, where Democrats have already stalled the chamber's own version of the defence bill over concerns related to the Iran war.

Ahead of the vote, US House Armed Services Committee Democrat Adam Smith criticised the Trump administration's defence policies, particularly those of War Secretary Pete Hegseth, saying they had weakened bipartisan support on national security issues.

"We are in an incredibly, incredibly dangerous time. I want to maintain the bipartisan nature of this bill," Smith said, as quoted by Politico.