University of Kentucky law professor and former immigration attorney Matthew Boaz is voicing serious concerns about Marco Rubio’s recent threat to revoke Chinese student visas.

Rubio’s vague reference to “critical fields” leaves experts wondering, does that mean science, engineering, or something else entirely? Boaz also criticized the suspension of all F, M, and J visa interviews, saying it’s causing chaos just months before the fall semester.

With international students playing key roles as research and teaching assistants, Boaz warns that this shift in immigration policy could disrupt university planning and student futures. And the added scrutiny of social media profiles? That’s just adding more uncertainty to an already tense situation.