The lawsuit, filed Thursday in the U.S. District Court for the Eastern District of California, alleges the practice harms U.S. citizens and encourages illegal immigration. Among the defendants are the state, top state officials, and the state's two public university systems, the University of California and California State.
President Donald Trump's administration has filed similar lawsuits against policies in other states, including Illinois, Oklahoma, Minnesota, Kentucky and Texas. Half the country now has similar laws to California's.
In June, after the administration sued, Texas ended its decades-old law. And Florida last year scrapped its law that allowed in-state tuition for high school graduates who weren't in the country legally.
“California is illegally discriminating against American students and families by offering exclusive tuition benefits for non-citizens,” Attorney General Pamela Bondi said in a statement. “This marks our third lawsuit against California in one week — we will continue bringing litigation against California until the state ceases its flagrant disregard for federal law.”