The Trump administration has thrown up new obstacles for international students, from travel bans to a pause in visa appointments and new layers of vetting. Arrivals of new international students to the U.S. plunged last fall. New would-be students had to look elsewhere, but the hurdles have made life particularly complicated for ones like Patrick Thaw who were well into their U.S. college careers. Thaw, a Myanmar native, had planned to return to the University of Michigan for his junior year after completing a research internship in Singapore last summer. Instead, he was stranded half a world away by a shift in U.S. immigration policy.