A bipartisan coalition of senators on Wednesday introduced 22 separate resolutions of disapproval aiming to reaffirm the role of Congress when it comes to approving the sales of arms to foreign governments.

The effort, led by Sens. Lindsey Graham (R-S.C.), Chris Murphy (D-Conn.), Rand Paul (R-Ky.), Patrick Leahy (D-Vt.), Todd Young (R-Ind.) and Jack Reed (D-R.I.), follows Secretary of State Mike Pompeo’s announcement last month that President Donald Trump was waiving congressional authority to complete 22 arms deals, worth about $8 billion, that would benefit Saudi Arabia, the United Arab Emirates and other countries.

The Trump administration has argued that an increased threat from Iran necessitated invoking the president’s emergency powers under the Arms Export Control Act to approve the arms deals to Saudi Arabia, a key ally in the Middle East. Members of both parties in Congress, however, objected to the selling of arms due to the ongoing Saudi Arabian military campaign in Yemen that has been blamed for tens of thousands of deaths and mass starvation. Lawmakers have also faulted Saudi Arabia Crown Prince Mohammed bin Salman for his country’s involvement in the slaying of Washington Post columnist Jamal Khashoggi.

“The Trump Administration’s effort to sell billions of U.S. weapons to Saudi Arabia and the United Arab Emirates is yet another example of an end-run around Congress and a disregard for human rights. We are taking this step today to show that we will not stand idly by and allow the President or the Secretary of State to further erode Congressional review and oversight of arm sales,” Sen. Bob Menendez (N.J.), the top Democrat on the Senate Foreign Relations Committee, said in a statement on Wednesday.

Under the Arms Export Control Act, lawmakers have the authority to force a vote on a joint resolution of disapproval against a proposed arms sale. The Senate already passed one such resolution of disapproval against the U.S. support for the war in Yemen last year in a 56-41 vote. Trump vetoed the measure.