The SAVE Act aims to require documentary proof of citizenship to vote in federal elections, addressing the lack of enforcement mechanisms in current law. While Republicans support the act with 104 co-sponsors, Democrats oppose it, arguing that non-citizen voting is already illegal, not widespread, and that the bill could disenfranchise voters. Republicans argue that there are examples of non-citizen voting issues in various states, pointing to instances in Virginia and Texas. The lack of comprehensive data on this issue is attributed by Republicans to the Biden administration.