The Trump administration’s attempt this month to deport a Columbia University graduate and pro-Palestinian campus activist due to his alleged “activities aligned to Hamas” was the first case of its kind to grab headlines.

The Trump administration has likely exceeded its authority in invoking rarely applied laws to justify parts of its wide-ranging immigration crackdown, legal experts said. Still, the Supreme Court could ultimately determine if the White House has the far-reaching power it claims to decide who should be deported.

Homeland Security had been focused on migrants who arrived at the border. Now, the administration has foreign-born academics in its crosshairs and may be trying to make examples of them.