The Trump administration has implemented stricter visa regulations affecting foreign students, cultural exchange visitors, and journalists.New rules set fixed durations for F visas (up to four years), J visas (240 days or 90 days for Chinese nationals), and I visas (journalists).Students face restrictions on changing educational objectives and must leave the U.S.within 30 days after completing studies.Critics argue these measures create barriers for international students and journalists, citing potential impacts on academic and media sectors.The Department of Homeland Security cited a rise in visa admissions as justification, emphasizing challenges in monitoring non-immigrants.Extensions require DHS approval or re-entry through travel abroad.