美政府限制哈佛国际生三类签证发放，外媒：标志两方矛盾“急剧升级”

Group 1 - The Trump administration has ordered a halt to the issuance of visas for new international students at Harvard University, marking a significant escalation in tensions between the federal government and the institution [1] - The presidential announcement targets various visa types, including F, M, and J visas, with only a few exceptions for individuals deemed to be in the "national interest" [1] - The White House claims that Harvard has failed to manage its international student programs effectively and has raised concerns about the university's alleged harboring of extremism and failure to report misconduct [1] Group 2 - The Department of Homeland Security previously revoked Harvard's ability to enroll international students, although this action was temporarily halted by a federal court [2] - Columbia University is also facing scrutiny, with the Department of Education warning that it has not adequately protected Jewish students from harassment, potentially jeopardizing its accreditation [2] - If Columbia's accreditation is revoked, it would lose access to federal funding and student aid, although such a process typically takes years to unfold [2]