International students make up the vast majority of students enrolled in US university classes in electrical engineering, computer science, industrial engineering, statistics, and mechanical engineering. They make up smaller majorities in other STEM fields (STEM stands for “Science, Technology, Engineering and Math”). In past years this was America’s advantage because these students would typically seek green cards no matter what the obstacles.
Now, however, the “brain drain” is working against the United States. Due to economic advances in many of these students’ home countries, particularly China, many seek to return home after graduation or are at least willing to return home if significant immigration obstacles block their path. This state of affairs should be considered a national security issue of the first degree.