The U.S. Department of Justice sued the state of California on Thursday, challenging a state law that allows undocumented students to pay in-state tuition rates. The lawsuit also targets the California Dream Act, which offers state financial aid to undocumented students who meet certain requirements.

The complaint, filed in the Eastern District of California, targets the state, Governor Gavin Newsom, state attorney general Rob Bonta, the University of California Board of Regents, the California State University Board of Trustees and the California Community Colleges’ Board of Governors.

“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.

California marks the sixth state the federal government has sued over such policies, but unlike some of the others, California plans to fight back. The state is home to more than 102,000 undocumented students, who have been permitted to pay in-state tuition rates since 2001 if they met certain requirements. Undocumented students have also been allowed to access state financial aid for more than a decade, according to the Higher Education Immigration Portal.

Newsom has repeatedly pushed back on the Trump administration’s policies, including immigration crackdowns. The DOJ filed another lawsuit against the state on Monday, after Newsom signed a bill banning face coverings for federal immigration agents. The DOJ also recently sued Newsom and California Secretary of State Shirley Weber over the state’s redistricting plan.

Bondi said in her statement that the DOJ will “continue bringing litigation against California until the state ceases its flagrant disregard for federal law.”

But Newsom isn’t backing down.

“The DOJ has now filed three meritless, politically motivated lawsuits against California in a single week,” Marissa Saldivar, a spokesperson for the governor’s office, said in a statement to Inside Higher Ed. “Good luck, Trump. We’ll see you in court.”

By contrast, Texas and Oklahoma, faced with similar lawsuits this summer, swiftly sided with the DOJ, quashing in-state tuition benefits for their undocumented students. The Kentucky Council on Postsecondary Education also agreed to stop offering in-state tuition to noncitizens in September, a few months after the DOJ sued, but the legal battle is ongoing. A judge recently allowed a group of Kentucky undocumented students, represented by the Mexican American Legal Defense and Educational Fund, to intervene in the case. Legal fights in Minnesota and Illinois have also continued as the states defend their in-state tuition policies against DOJ challenges.

The government argues that such laws violate a federal statutory provision that says undocumented people can’t receive higher ed benefits unless citizens are also eligible. The DOJ has asserted that states can’t permit undocumented students in a state to pay lower tuition rates while denying out-of-state citizens the same benefit. Proponents of California’s current policy argue it allows any nonresident who meets certain requirements—including spending three years in a California high school—to access in-state tuition, not just undocumented students.

Rachel Zaentz, a spokesperson for the University of California system, said system leaders believe they’ve acted within the law.

“For decades, the University of California has followed applicable state and federal laws regarding eligibility for in-state tuition, financial aid, and scholarships,” Zaentz said in a statement sent to Inside Higher Ed. “While we will, of course, comply with the law as determined by the courts, we believe our policies and practices are consistent with current legal standards.”

California Community Colleges Chancellor Sonya Christian said in a similar memo that the system “will follow all legal obligations and fully participate in the judicial process alongside our state partners” but “statutes referenced in the lawsuit have been in place for many years and have been implemented in accordance with long-standing legal guidance.”

“Although we cannot comment on ongoing litigation, our commitment remains unchanged: we will continue to ensure that all students who qualify under state law have access to an affordable, high-quality education,” Christian said. “We will also continue to comply fully with all current federal and state requirements.”

Iliana Perez, executive director of the advocacy organization Immigrants Rising, called the latest lawsuit an “an affront to the decades of hard-fought student-led advocacy for equitable access to postsecondary education.” She also noted the challenge comes just a week before college applications are due at public four-year institutions in the state.

“This challenge is a callous attempt to have students second-guess their dreams,” Perez said in a statement. “We have one message for this Administration; we will not be deterred!”