US lawmakers will try again next week to pass a resolution to halt the Iran war and force President Donald Trump to obtain Congress' approval for any further attacks, Senate Democratic Leader Chuck Schumer said on Wednesday, hours after Trump announced a two-week ceasefire, Reuters reports.

"Congress must reassert its authority, especially at this dangerous moment," Schumer told a press conference at his office in New York.

Separately, the Democratic leader in the US House of Representatives, New York Representative Hakeem Jeffries, said the House should also vote on a resolution to curb the war on Iran.

"We need a permanent end to Donald Trump's reckless war of choice," Jeffries said on CNN.