Students queueing for security checks outside Columbia University in New York on March 24. PHOTO: AFP Singaporean students in US on edge amid Trump’s crackdown on pro-Palestinian protesters on campus – For generations, the US promised international students not just a degree but also a voice – one grounded in academic freedom and open debate. Now, that legacy is unravelling, as a sweeping crackdown leaves immigrant communities – including more than 4,000 Singaporeans studying in America – on edge. The government revoked the visas of more than 300 students and visitors because of their foreign policy views or criminal activities,...