This administration has "rewritten the law" with their own interpretations so anything that is actually "lawful" is irrelevant to them.
45 has been implementing E.O.s as his own "new law" to supersede the Constitution and ACTUAL "law" (despite an E.O. NOT being a "law", but is simply supposed to be "instructions" for how Executive Branch employees are to carry out THE LAW passed by Congress and signed by the President (or that goes into effect without a signature under certain circumstances or that has a Presidential veto overridden by Congress).
From here - https://www.propublica.org/article/donald-trump-immigration-executive-orders
Travel bans
Seeks to identify countries considered to have vetting and screening information that is deficient in order to determine whether it is fully or partially suspending entry of those nations citizens to the U.S.
History
Soon after taking office, Trump issued a sweeping travel ban that barred nearly all travelers from five mainly Muslim countries as well as North Korea and Venezuela. The order was immediately challenged in court. After several revisions, the U.S. Supreme Court eventually upheld a third version of the order.
Junior Alvarado is from a "banned country" per this idiotic E.O. and can have any Visa that he has (if he has one) revoked and can be deported, and it will take months to resolve through the (slow) courts. If his Visa is expired, he can be a goner almost immediately if they want. I.e., if he is not a naturalized citizen and is not here as a "legal resident" or on a green card, then he can be "disappeared".