According to the Glossary of the US Department of Homeland security, The word Alien is a Terminology in Title 8 of U.S. Code to describe a person who is not a citizen or national of the United States. "Alien" is the term in statute.

https://www.dhs.gov/ohss/about-data/glossary

I think that ALL ''ALIENS'' should be legal everywhere, by saying this I mean that all countries should be the same as the United States and you should be allowed to live and become a citizen anywhere in the world  . I think we should all have the same rights and be treated equally. In my view I'd like to make All '' Illegal Aliens ''  legal and welcome all Earthly and universal Aliens into Earth. We are a Family just like the yip Martian Aliens say.