President Trump made good on a promise Tuesday to veto a resolution approved by both houses of Congress to end U.S. military involvement in the Saudi-led war in Yemen.

The War Powers Act resolution was backed by Sen. Bernie Sanders and East Bay Rep. Ro Khanna.

“I will not give up this fight,” said Rep. Ro Khanna.

The conflict in the Middle East has created an immense humanitarian disaster that includes death, starvation and disease affecting millions of Yemenis. Khanna was one of the first on Congress to shine a light on the U.S. military support for Saudi Arabia in the war.

Although discouraged by Trump’s veto, Khanna said, “I will not give up this fight. He suggested using other budgetary strategies, and further legislation to end the nation’s role in the conflict.

“From a president elected on the promise of putting a stop to our endless wars, this veto is a painful missed opportunity. The Yemen War Powers Resolution was a bipartisan, bicameral effort to end the world’s largest humanitarian crisis and supported by some of the president’s most trusted Republican allies,” Khanna continued.

“This resolution nonetheless was a major win. It sends a clear signal to the Saudis that they need to lift their blockade and allow humanitarian assistance into Yemen if they care about their relationship with Congress… We have the leverage over the Saudis: they need us more than we need them. It’s time to use that leverage to end this war and save the lives of 14 million people.”