A crackdown on foreign students is alarming colleges, who say the Trump administration is using new tactics and vague justifications to push some students out of the country.

The cancelations come in the midst of a widespread crackdown against students federal officials contend are acting against national interests.

Universities across Minnesota are scrambling to help international students after more students had their visas revoked, schools reported Thursday, just a day after five international students in Mankato had their student visas terminated.