That's bringing people from overseas to the U.S. to take American jobs. But millions of jobs in customer support, accounting, IT, medicine, banking, and the law have been outsourced to overseas vendors and are no longer being done in the U.S. by anyone, H-1B or other. Ending H-1Bs won't end that. What will Trump do that will?
The jobs you are service jobs and not manufacturing. Those services with be subject to a import tax like on durable goods. Same concept.