The Department of Homeland Security is opening up its immigration database to several battleground states that want to identify and kick off non-citizens from their voter registration rolls, NPR reported.

Homeland Security initially denied Florida's request to access the database, arguing it would violate voting rights laws, before a federal judge sided with Florida and forced DHS to open the database. Florida, Colorado, Nevada and other battleground states may soon start using the data to purge legal immigrants who have not yet become citizens from the rolls.