American universities run on international students. For decades, schools have competed to enroll students from all over the world, and many rely on their talent and labor — as well as their tuition dollars. But over the past few months, the Trump administration, often citing national-security concerns, has tried to either block international students from entering the country or revoke the visas they already have. Some, like Palestinian Columbia graduate Mahmoud Khalil , have been targeted for peaceful protests against Israel’s attacks on Gaza. Others say they have been targeted for as little as an unpaid traffic ticket or nothing at all.

The government’s first run of attempts to revoke student visas without due process began in March and April. After students met those attempts wi

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