This is yet another attack against immigrant students as noted in sibling comments. But it is also an attempt to force universities to open in the Fall despite

This is yet another attack against immigrant students as noted in sibling comments. But it is also an attempt to force universities to open in the Fall despite the dangers of doing so. Many universities depend on the tuition from foreign students. The timing shows this (right after Harvard announced plans to go online), as well as Trump's tweets that schools must open in Fall.