Justices’ Donor Law Case Could Impact Campaign Finance (1)

California’s donor disclosure law seemed likely to fall after oral arguments on Monday, but how broadly the U.S. Supreme Court decides the case could have major implications for campaign finance.

The justices seemed to agree with the Koch-backed Americans for Prosperity Foundation that conservative donors could face a backlash if charities are required to turn over the identity of their largest donors, as the California law requires. A majority appear primed to say the law violates the First Amendment.

Americans for Prosperity Foundation is backed by dozens of ideologically diverse groups, a fact noted by Justice Brett Kavanaugh. “There’s an ...