A protester holds a sign with a reference to the 25th Amendment to the US Constitution, that cites procedures for a presidential disability, during a demonstration against US military action in Iran near the White House in Washington, DC, on April 7, 2026. On April 7, US President Donald Trump warned that "a whole civilization will die" in Iran if the country does not heed his midnight cutoff to open the Strait of Hormuz, as Tehran reported US-Israeli attacks on its infrastructure were already underway. (Photo by Mandel NGAN / AFP via Getty Images)