SAN FRANCISCO ­— The U.S. Court of Appeals for the Ninth Circuit on Monday again upheld California’s Proposition 209 ban on affirmative action.

It wasn’t hard to do, considering the court had already weighed the law in the 1990s, when it was first approved by voters. Relying on the 1997 ruling in Coalition for Economic Equity v. Wilson, the court in the current challenge, Coalition to Defend Affirmative Action v. Brown, 11-15100, rejected equal protection claims.