The U.S. Supreme Court declined on Monday to hear a challenge based on constitutional free speech protections to a voter-approved measure in Alaska that required greater public disclosure of certain political donations as the justices passed up a chance to further curtail campaign finance regulation.

The Supreme Court has left in place disclosure rules for campaign contributions that Alaska voters approved in a 2020 ballot measure

The Supreme Court on Monday declined to review a challenge to Alaska’s Ballot Measure 2, a voter-approved law requiring more transparency in campaign donations. Passed in 2020, the measure introduced several changes to Alaska’s election system,