Manisha Puppala, an Indian national who recently graduated with a master’s degree in tech management from the Rochester Institute of Technology, planned to apply for an H-1B work visa to remain in the U.S. after her studies. Now that the Trump administration has announced a $100,000 fee for new H-1B applications, her future is in doubt. Puppala, who took on $120,000 in loans to study in America and has been working at a Boston firm on a permit that allows foreign students to work temporarily in the U.S., had dreamed of running her own startup. “What do I do now?”...