An increasing number of student deportation threats involve the revocation of visas based on relatively minor offenses like years-old misdemeanors, according to immigration attorneys, or sometimes no reason at all.

Dozens of schools, including the University of California and Harvard, said the Trump administration ended the visas of their students in recent days. For many, the reasons are unclear.

In a email that went out to all Clark students and faculty, Clark said 12 current students had been identified through an examination of the government-run Student and Exchange Visitor Information System (SEVIS) database,