Matters having to do with immigration quotas, asylum, etc. are matters for Congressional determination. As least it used to be. Maybe Congress have given it up.
Congress has become the Roman Senate -- prestigious job, nice perks, lots of money available to you, you get elevated above the plebeian class, and you don't have to do a damn thing, because the Emperor makes all the decisions.
Congress has abdicated its responsibilities a long time ago,they are all terrified of the media’s attack against them if they do anything to obstruct the BLACK GUY