“COLOR US UNIMPRESSED,” Iran’s Foreign Minister Mohammad Javad Zarif tweeted Monday night, employing Trump’s penchant to use all capital letters in his tweets.

“The world heard even harsher bluster a few months ago. And Iranians have heard them — albeit more civilized ones — for 40 yrs. We’ve been around for millennia & seen fall of empires, incl our own, which lasted more than the life of some countries. BE CAUTIOUS.”