Harvard University has rejected the complaint as 'another pretextual and retaliatory action' from the Trump White House.
Minister Carlos Fernandez de Cossio says he is open to US trade talks but refused to entertain a leadership shake-up.
Mojtaba Khamenei has not been seen in public since he replaced his slain father as Iran's supreme leader.
Trump is calling for US allies to help guarantee shipping through the Strait of Hormuz as NATO relocates Iraq personnel.
From degradation of military to efforts to foment unrest, targets show array of objectives but no single endgame.
Move comes as Swiss government also closed its airspace to US military flights directly linked to the Iran war.
The price of Russian Urals has soared in recent weeks. How Russia – and other energy producing nations – could profit.
Volodymyr Zelenskyy says 'clear dates' needed as Ukrainian negotiators prepare for discussions in US.
Experts say while Gulf states need support in face of Iranian attacks, it is less clear what their allies can provide.
Israeli and US air attacks pound Iran as assassination campaign of country's leadership continues.