In India, some of the biggest jobs in tech come to you. Graduates of the Indian Institute of Technology (ITT), one of the country’s most prestigious universities, are recruited directly by Indian companies as well as American firms looking to lock down some of the world’s top talent in fields that will dominate the future, such as artificial intelligence and robotics. Many of them also continue their studies in the United States, where India overtook China last year as the biggest source of foreign students. But policy decisions and other moves by the Trump administration, including the recently announced $100,000...