A video of progressive Senator Bernie Sanders, a Vermont independent, reacting live at a rally to the news that President Donald Trump had carried out strikes on Iranian nuclear sites has gone viral on social media.

Watch the viral video clip of Sen. Bernie Sanders after someone in the crowd broke the news about the United State bombing Iran on Saturday.

Sen. Bernie Sanders was at a tour stop in Tulsa when he learned of the U.S. strikes in Iran. He described the action as "grossly unconstitutional."