New Delhi, Oct. 16 -- Over 60 American CEOs and deans have written an open letter to Donald Trump and other leaders in the Wall Street Journal, urging them to ease H-1B visas and dump country-specific limits. This suggests a growing realization that the US president's clamps on the entry of non-citizens to the US have hurt its own economic interests. The letter reportedly says that the US lacks high-skill talent, and a drop in student admissions over the past three years has worsened the scarcity. It lauds the creation of three million science, technology, engineering and mathematics jobs, but bemoans the country's inability to fill them on its own.

America's very success, many would argue, was powered by its openness to immigrants. Some...