Recently, the U.S. Department of Homeland Security revealed that over 100,000 visas have been revoked since the Trump administration. This measure was primarily driven by national security concerns, targeting visa holders deemed potentially risky—including students, visiting scholars, and certain work visa recipients. Visa cancellations typically occur when new information emerges during background checks, allegations of misrepresentation arise, or ties to sanctioned entities are discovered. Notably, many of these revocations happen after individuals have already entered the U.S., meaning lawful entry does not guarantee continued legal status, as subsequent investigations may lead to cancellation and possible deportation.During his term, President Trump implemented an ‘America First’ agenda, intensifying scrutiny of both immigrant and non-immigrant visas. Particularly stringent restrictions were placed on students and researchers from countries like China in STEM (Science, Technology, Engineering, and Mathematics) fields. These actions sparked widespread debate over academic freedom, racial profiling, and diplomatic repercussions. Although the Biden administration has revised some immigration policies, the visa revocation mechanism remains in place and continues to be used in cases perceived as national security threats.Experts note that the surge in visa cancellations reflects a broader tightening of oversight on international talent mobility and serves as a reminder for students and professionals to ensure full accuracy and compliance throughout their visa applications and stays in the U.S. to avoid legal complications.
近期，美国国土安全部披露，自特朗普政府时期起，已有超过10万份签证被撤销。这一举措主要基于国家安全考量，针对被认为存在潜在风险的签证持有人，包括学生、访问学者及部分工作签证持有者。签证撤销通常发生在申请人背景审查出现新信息、涉嫌虚假陈述或与受制裁实体有关联的情况下。值得注意的是，此类行动多在申请人入境美国后进行，意味着即便已合法入境，仍可能因后续调查而被取消身份并面临遣返。特朗普政府在任期间推行“美国优先”政策，加强了对移民和非移民签证的审查力度，尤其在STEM（科学、技术、工程和数学）领域对中国等国家的留学生和研究人员实施更严格限制。此举引发外界对学术自由、种族偏见及外交关系影响的广泛讨论。尽管拜登政府上台后调整了部分移民政策，但签证撤销机制仍被保留，并继续用于处理被认为威胁国家安全的个案。专家指出，签证撤销数量激增反映出美国对外国人才流动监管趋严，也提醒国际学生和专业人士在申请和持签过程中需确保信息真实、合规，以避免不必要的法律风险。
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