“People have been asking how Bernie can distinguish himself from rivals who at least profess agreement on domestic issues,” tweeted HuffPost reporter Daniel Marans. “This is one area where the distinction is clear.”

Rep. Alexandria Ocasio-Cortez (D-N.Y.) called the Vermont senator’s statement “a big deal.”

“One thing that is completely undeniable about Bernie Sanders is the enormous political courage he consistently wields on behalf of others,” tweeted Ocasio-Cortez. “He’s not just standing up for two members—he’s standing for the integrity of the entire U.S. Congress.”

In addition to his comments on MSNBC, Sanders, who is Jewish, released an online video to push back against the specific claim made by President Trump and many others that to criticize the policies of the Israeli government is to be anti-Semitic—a charge he said is “disgusting.”

Sanders’ appearance on MSNBC Thursday night was not the first time the senator has called out U.S. military aid to Israel as the Netanyahu government enacts racist policies and commits atrocities against Palestinians.

Speaking to the Council on Foreign Relations last month, Sanders said, if elected president in 2020, he would “be willing to bring real pressure to bear on both sides, including conditioning military aid, to create consequences for moves that undermine the chances for peace.”