Congress can create term limits for U.S. Supreme Court justices by statute, even if it may be a “difficult political slog,” retired federal appeals court judge Diane Wood said Tuesday.

President Joe Biden has proposed 18-year terms for justices, with presidents able to appoint a new member every two years. He hasn’t yet provided details on how it would work, but a bipartisan commission Biden assembled issued a report in 2021 that suggested justices serve 18 years and then sit when a recusal arises or by designation on the lower courts.