Actually Congress doesn’t have a say in this without passing a new law. Biden has the power to stop weapon shipments today. He already stopped the 2,000 lb and 500 lb bomb shipment. Which is also a tacit acknowledgement that they know Netanyahu is committing war crimes and thus is ineligible for any military aid under the Leahy Law and Foreign Assistance Act.

Biden has the legal power to announce the suspension of all military aid and sales to Israel right now.