Five months and at least two ceasefires into the US-Israeli war on Iran, hostilities have intensified again, with US President Donald Trump reimposing a naval blockade on Iranian ports and American forces trading fresh strikes with Tehran. The renewed cycle is testing both Tehran’s resilience and Washington’s appetite for a prolonged conflict, prompting some analysts to draw uncomfortable parallels with the political tolls that past US presidents faced in drawn-out wars such as in Vietnam and...