No.
a·li·en. [ˈālēən]
ADJECTIVE
1. belonging to a foreign country or nation.
We don’t call people who come to the U.S. via the legal channels “legal aliens”...
No, we call them "immigrants".
What an idiot.
The law distinguishes between "resident aliens" and "non-resident aliens."
Both could be called "legal aliens," rather than "illegal aliens," also a term from the law books.
I notice though, that a lot of sources that don't go with the "undocumented workers" euphemism are using "illegal immigrants," rather than "illegal aliens."