https://en.wikipedia.org/wiki/Systematic_Alien_Verification_...
> Systematic Alien Verification for Entitlements (SAVE) is a program managed by United States Citizenship and Immigration Services (USCIS), a branch of the US Department of Homeland Security (DHS). SAVE was created in 1986 and facilitates lookups on the immigration and nationality status of individuals in the United States.
The wikipedia article is written ambiguously, or they bury the actual purpose of the SAVE database
> a system for verifying the immigration status of non-citizen applicants applying for (medicad, food stamps, unemployment, student loans and housing assistance)
It wasn't designed to be a citizenship database.
https://apnews.com/article/save-database-noncitizen-voters-t...
https://www.cbsnews.com/news/supreme-court-trump-save-system...