On Tuesday, President Donald Trump vetoed a bipartisan bill that sought to terminate the United States’ assistance of the Saudi bloc that is participating in the Yemen civil war. Trump claimed the measure was “an unnecessary, dangerous attempt to weaken my constitutional authorities.” It was the second veto Trump enacted in his presidency, with the first having occurred last month.

The War Powers resolution was supported by both Democrats and Republicans, including those who support Trump. Some supported the bill as a response to the death of Jamal Khashoggi, a journalist Saudi Arabia reportedly murdered.

When vetoing the bill, which Trump labeled a “political document,” the president reiterated something many in his party have noted: the United States has never engaged in warfare with Yemen forces. In his letter, Trump wrote that there “are no United States military personnel in Yemen commanding, participating in, or accompanying military forces of the Saudi‑led coalition against the Houthis in hostilities in or affecting Yemen.” Additionally, Trump insists backing the Saudi-led forces is essential in mitigating Iran’s power in the region. Trump had previously claimed that the War Powers act would “embolden” Iran.

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Californian Democrat Rep. Ro Khanna expressed his disappointment in Trump’s decision, calling the veto a “painful missed opportunity” for him, adding how Trump was “elected on the promise of putting a stop to our endless wars.” Continuing, Khanna said, “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.” Bernie Sanders (I-Vt.) championed the bill and promised to continue to uphold it rhetoric. “The people of Yemen desperately need humanitarian help, not more bombs,” Sanders said.

Trump, however, maintains that it would hurt the U.S. if it ceases its support of the Saudi coalition. “My administration is currently accelerating negotiations to end our military engagement in Afghanistan and drawing down troops in Syria, where we recently succeeded in eliminating 100 percent of the ISIS caliphate,” Trump said. “Congressional engagement in those endeavors would be far more productive than expending time and effort trying to enact this unnecessary and dangerous resolution that interferes with our foreign policy with respect to Yemen.”