President Barack Obama's decision last year to allow hundreds of thousands of young people living in the country illegally to stay and work marked the biggest shift in immigration policy in decades.
Many months later, a handful of Republican-led states are blocking basic benefits for those in the program.
Some states are denying beneficiaries identification cards, driver's licenses, health care, in-state tuition, student financial aid, college admission or other privileges typically afforded to legal residents.
Others have set out welcome signs for the immigrants, including 12 that grant resident tuition for immigrants who graduated from local high schools.
Under the so-called Deferred Action for Childhood Arrivals program, roughly 1.7 million immigrants are eligible for work permits good for two years.