At war with Iran, President Donald Trump is cycling through an increasingly desperate list of options as he searches for a solution to the crisis in the Strait of Hormuz. He is jumping from calls to secure the waterway through diplomatic means to lifting sanctions and now escalating to a direct threat against civilian infrastructure in the Islamic Republic. Trump and his allies insist they were always prepared for Iran to block the strait, yet the Republican president's erratic strategy has fuelled criticism that he is grasping for answers after going to war without a clear exit plan. On Saturday came his latest attempt, via an ultimatum to Iran: Open the strait within 48 hours or the United States will "obliterate" the country's power plants. Trump's aides defended the threat as a hard-edged tactic to press Iran into submission. Opponents framed it as the failings of a president who miscalculated what it would take to get out of a geopolitical mire. "Trump has no plan to reopen t