The Trump administration announced a new proposed rule on Wednesday to increase vetting of foreign nationals and prevent "forever" students who abuse the visa system. Trump's Department of Homeland Security highlighted F visas for students, I visas for media members, and J visas for exchange visitors, which include professors, research assistants, au pairs, and camp counselors, among others. The rule proposes ending "duration of status" for these visa programs, which currently allow immigrants to remain in the United States for an unspecified period of time without further screening. "In turn, foreign students have taken advantage of U.S. generosity and have...