6月1日，美国政府针对部分中国留学生入境禁令生效。当天，美国国务卿MICHAEL R. POMPEO在美国国务院官网发布了一则公开声明：
Our concern is with the malign actions of the Chinese Communist Party and specific individuals, not with the Chinese people. The graduate students and researchers who are targeted, co-opted, and exploited by the PRC government for its military gain represent a small subset of Chinese student and researcher visa applicants coming to the United States. We expect this new visa policy will contribute to an improved, open, and transparent environment in which U.S. and Chinese scholars can engage with greater trust. At the same time, the United States will continue do everything in its power to safeguard U.S. technology and institutions, and to ensure our national and economic security remain safe and free from foreign interference.