Sen. Lindsey Graham (R-S.C.) said Saturday that it’s time for the U.S. to weigh an attack on Iranian oil refineries if the nation continues its “provocations.” He warned that such a raid would “break the regime’s back.”

Graham raised the possibility of U.S. military action following drone attacks early Saturday on a massive oil field and the world’s largest oil producing facility in Saudi Arabia that disrupted 50% of Saudi oil output — and 5% of the global supply.