International students and Arab travellers to the US are increasingly finding that their visas can be revoked overnight, with their plans upended by a single email. "After President Trump took office," adds Hamza, "every violation became a target, the largest crackdown on international students." In August, the US Secretary of State Marco Rubio announced the cancellation of 6,000 student visas because of overstays, offences, or “support for terrorism”. The US is home to 1.1 million international students, of which an estimated 90,000 are from the Middle East. I have no political activity on the ground or on social media to justify the rejection.”Consular frictions are intensifying as well.