Defying President Donald Trump's unilateral decision to sell $8bn-worth military equipment to Saudi Arabia and UAE US Senator Bob Menendez began a formal process of blocking the White House plan setting up Senate votes on the matter as soon as this week.
This is the first of 22 similar resolutions objecting to the military sales introduced last month by politicians, including some of Donald Trump's fellow Republicans, who objected to the president's decision to bypass the Congress and forge a lucrative deal.
Backers of the arms sales said they would support US partners to counteract Iranian aggression. Opponents said Saudi Arabia should be held accountable for human rights abuses, including the murder of Saudi journalist Jamal Khashoggi at a Saudi consulate in Turkey.
Menendez said Saudi Arabia has used the precision-guided munitions, or PGMs, "in the killing of untold numbers of innocent civilians in their ongoing campaign in Yemen".