Trump’s crackdown on university protests is casting a long shadow. Activists hope he’s also providing a spark

Columbia University has become the reluctant poster child for President Donald Trump ’s actions aimed at higher education.

The administration has wielded its immigration authority to cancel the visas of hundreds of international students and visitors in the US .

Federal officials argue the moves are meant to combat antisemitism and bolster national security.

Students who spoke with CNN describe a tense mood on campus as the changes take hold.

Critics say the measures set a troubling precedent that could stifle all forms of expression.

One Princeton professor predicts “serious clashes ahead” as universities are “put into impossible situations” and student activists “refuse to cave in to the political pressures” A Columbia professor says the policy changes are likely to make student protesters change their methods.

Unions have a long history of mobilizing for change on campuses, says Sebastian Spitz .

“Universities must speak out against these assaults. They must do so collectively, with other civic organizations,” he says.

Spitz: "The vast majority of Americans did not go to Harvard and do not care what ( Harvard University ) President Garber thinks".