Yemen's civil war has been going since 2015 and pits the Iran-backed rebel Houthis against the internationally-recognized government of President Abdu Rabbo Mansour Hadi, a Saudi ally. The fighting has exacerbated what the United Nations in December called the world's worst humanitarian crisis. A U.N. report that month said almost 16 million Yemenis face food insecurity.
Vermont Sen. Bernie Sanders said Thursday the resolution would end the United States' "unconstitutional support for the catastrophic war in Yemen."