WASHINGTON (AP) — The Supreme Court has ordered California to stop collecting the names and addresses of top donors to charities.

The justices voted 6-3 along ideological lines to side with two nonprofit groups, including one with links to billionaire Charles Koch, that argued California’s policy violates the First Amendment. The nonprofits had drawn strong support from groups across the political spectrum, including the American Civil Liberties Union and NAACP Legal Defense and Educational Fund.

California requires all charities that collect money from state residents to give the state an IRS form identifying their largest contributors. The information is not supposed to be disclosed publicly.