Trump threatens Iran with what 'few throughout history have suffered before'

AVA- 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.”
“You declare war and then you speak of wanting to support the Iranian people,” he told the US president, adding "You are not in a position to incite the Iranian nation against Iran's security and interests.”
Also on Sunday, US Secretary of State Mike Pompeo announced in a speech that the Trump administration had launched a "maximum pressure campaign" targeting Iran and its economy.
The US will pursue a "diplomatic and economic pressure campaign" on Iran, Pompeo said as he appealed to Iranians who fled the country after the 1979 Islamic Revolution, including MKO terrorists.