Trump's pugnacious Tweeter message in all capital letters late Sunday came following Iranian President Hassan Rouhani's warning to him not to “play with the lion’s tail” after the US unveiled a series of measures which amount to a declaration of war. "NEVER, EVER THREATEN THE UNITED STATES AGAIN OR YOU WILL SUFFER CONSEQUENCES THE LIKES OF WHICH FEW THROUGHOUT HISTORY HAVE EVER SUFFERED BEFORE," Trump wrote. "WE ARE NO LONGER A COUNTRY THAT WILL STAND FOR YOUR DEMENTED WORDS OF VIOLENCE & DEATH. BE CAUTIOUS!" he added. Addressing a group of Iranian diplomats in Tehran Sunday, Rouhani said, “America must understand well that peace with Iran is the mother of all peace, and war with Iran is the mother of all wars.”