The White House can expect an unpopular response should they go on to propose laws that will make it tougher for documented immigrants to become U.S. citizens if they ever used a range of social services from Obamacare to food stamps. Why? Because the number of Americans who voted for Trump in 2016 is about 13 million fewer than the largest number of U.S. residents who could be targeted by the law. In fact, almost one-quarter of the U.S. population is made up of first-and second-generation immigrants. That’s 76.4 million people. About 63 million voted for Trump.