President Donald Trump's latest threat to Iran left a legal expert aghast on Monday. Glenn Kirschner, a former U.S. Attorney, discussed recent reporting on Trump's threat that Iran should be "blown off the face of the Earth" during a new episode of his podcast, "Justice Matters." Trump made the threat in a Truth Social post announcing that the U.S. would guide ships through the Strait of Hormuz. "He is a disgrace, a dangerous disgrace to the United States of America and all her people," Kirschner said, adding that such an action would amount to a war crime. "He is an unfit embarrassment to us all."Trump has made several threats against the Iranian regime as his administration tries to negotiate a settlement to the war in Iran. Trump has also threatened to wipe the Iranian civilization off the face of the Earth if the regime does not reopen the Strait of Hormuz, a critical global waterway that accounts for 20% of the world's energy trade. His comments were made at a time when the White House and the GOP have attacked Democrats over their political rhetoric following the shooting at the White House Correspondents' Dinner last month. Kirschner noted that Trump's comments show he "can neither fight nor negotiate his way out of the quagmire he created.""We used to believe that America was the envy of the world, and now America is the laughingstock of the world," he said. "Before Donald Trump's unconstitutional war, the Strait of Hormuz was open. Passage was unobstructed, but after Trump launched his reckless war with absolutely no legal justification and certainly no imminent threat to the United States, the Strait of Hormuz is virtually non-navigable. And Trump can neither fight nor negotiate his way out of the quagmire he created with his vanity war."