Prior to President Donald Trump authorizing targeted strikes against Iranian nuclear sites on Saturday, federal agents and Texas Department of Public Safety troopers have been arresting Iranian nationals, nearly all men, in the U.S. illegally. In the last few months, federal prosecutors have also brought terrorism charges against Iranians, including those in the U.S. working for the Iranian government. Iran is a designated state sponsor of terrorism. Iranian nationals illegally in the country are considered “special interest aliens” under federal law. The U.S. Department of Homeland Security on Sunday issued a warning to all Americans to be on a heightened...