H1b visas are the vehicles by which Silicon Valley obtains the workers they need to create products and services for the Internet. We don't know for sure whether Trump will drastically cut them back or not. But the reality is that if he does, there won't be Americans to replace these foreign workers.
The white people who put Trump into office certainly can't replace these foreign workers and neither can their children. The teachers unions have done their best to dumb down K-12 in America. People can graduate from high school without being able to do algebra. Then they can go to a university that is unexceptional where they can fulfill their math requirement by taking an advertising class. (this is not a joke. I can send you there.)
America has done its best to destroy its school system. Our universities, with their grade inflation, never test their students to see if they can compete with these foreign visa holders. People have decided it's better not to know how useless the skills are that these students have. This way they can blindly complain that they're being left out of America's future.
What passes for higher education in America is what used to constitute a high school education 40 years ago. If you haven't been a teacher, you have no idea how bad things are.
On this planet the students who test best go to school in the Shanghai school district. They are better than any students in the world. And if you're looking for students to compete against them, you should look at Singapore and Korea. Americans don't even rank among the top 10 in any discipline tested.
The new administration will be getting rid of any national standards for education in America in the name of state's rights (a perennial Republican weapon to prevent our country from aspiring to produce world-class students)
30 years from now there will be more angry white people. These people never think they should demand hard work and studious effort from their school districts and their children. The quality of the high school football team is their most important concern. In 30 years we will be creating even less than we do now. There are only so many jobs that require an ability to use a forklift and box cutters. The boxes will all be covered with Hanzi (Chinese characters) anyway.