Arizona’s Attorney General has filed a lawsuit challenging a health care law that provides millions of dollars in Medicaid funding to Arizona residents.

The lawsuit filed on Thursday in U.S. District Court in Phoenix alleges the Medicaid program violates federal law because it “exceeds the extent authorized under the Constitution and federal law.”

The lawsuit, filed by Attorney General Tom Horne, seeks to force Arizona to stop providing the money and is asking for unspecified damages, the Arizona Republic reported.

The state has been sued numerous times before, most recently by the Center for Media and Democracy, which sued the state in 2011.

A similar lawsuit filed in 2012 also failed to stop Arizona’s Medicaid expansion.

The Center for Medical Progress, which was funded by the Koch Brothers-backed Americans for Prosperity, released a documentary last year documenting how Arizona’s new Medicaid expansion has created a new “death spiral” of poverty, lead poisoning and drug overdoses, according to the lawsuit.

The state’s health care reform law passed in 2014 expanded Medicaid coverage to more than 20 million Arizonans.

It was designed to help low-income residents with health care costs and also address a shortfall in the state’s aging population.

The program, which expanded to cover more than 25 million Arizans by 2023, provides medical, dental and vision care, and covers people with disabilities.

It also allows residents to purchase private health insurance for up to 133 percent of the federal poverty level for a family of four.