Article continues below advertisementPresident Donald Trump's profane post on Easter Sunday has sparked massive backlash and market volatility as concerns about his declining mental health grow.In an early morning, an aggressively foul tirade on Truth Social, the president used an expletive-laden ultimatum to demand that Iran reopen the Strait of Hormuz."Tuesday will be Power Plant Day, and Bridge Day, all wrapped up in one, in Iran. There will be nothing like it!!!" Trump, 79, wrote.