In fact, President Trump could, by the constitutional power of his office, completely shut down the entire immigration and naturalization process, halting any further emigration to the U.S. permanently.
[…] Peter Spiro, a professor at Temple University Beasley School of Law, said Trump’s action would likely be constitutional because the president and Congress are allowed considerable deference when it comes to asylum decisions.“It’s a completely plausible prioritization, to the extent this group is actually being persecuted,” Spiro said. (read more)
No person outside of the United States has a “RIGHT” to come to, or live in the United States of America. Guest visitation (Visa approval) is a privilege, and emigration is entirely a structure of policy controlled by the executive branch of the U.S. through the Department of State.
