President Joe Biden, just three days after a U.S. Supreme Court justice cautioned against restructuring the high court, officially announced a commission to take an expansive look at the role of the court, its case selection, rules and practices, and the size and tenure of its membership.

The warning about court packing came from Justice Stephen Breyer, the court’s oldest member and one of three Democratic-appointed justices currently serving on the court. Breyer has been under pressure from liberal groups to retire soon and give Biden the opportunity to appoint the first Black female justice.