U.S. Sen. Bernie Sanders and a pair of his Senate colleagues on Wednesday formally introduced resolutions aimed at blocking a series of proposed arms sales to the Israeli government as it bombards Gaza and Lebanon, deepening humanitarian crises there and pushing the region to the brink of all-out war.

The six Joint Resolutions of Disapproval, five of which were backed by Sens. Peter Welch (D-Vt.) and Jeff Merkley (D-Ore.), would together prevent the sale of $20 billion of U.S. weaponry to Israel. The Biden administration approved the massive sale of Joint Direct Attack Munitions, tank ammunition, F-15 fighter jets, and other military equipment last month.