President Donald Trump has vetoed a bill Congress passed to end U.S. military assistance in the Saudi Arabia-led war in Yemen.

In a break with the president, Congress voted for the first time to invoke the War Powers Resolution to try and stop U.S. involvement in a foreign conflict.

Trump vetoed the measure Wednesday. Congress lacks the votes to override him.

RELATED: Senate votes to force US withdrawal from Saudi war in Yemen

Congress has grown uneasy with Trump's close relationship with Saudi Arabia as he tries to further isolate Iran, a regional rival. Many lawmakers also criticized the president for not condemning Saudi Arabia for the killing of a Saudi writer Jamal Khashoggi, who had been critical of the kingdom.

Trump Border Security Veto
President Donald Trump speaks about border security in the Oval Office of the White House, Friday, March 15, 2019, in Washington. (AP Photo/Evan Vucci)
AP