The Circuit Courts all have a SC Justice who is associated with that court. However, with 13 Circuit Courts and only nine SC Justices, there are a few Justices who oversee two courts. At the time the SC settled in at nine Justices, there were nine Circuit Courts.

And killing the filibuster to pass court expansion legislation must be a litmus test for every Dem senate candidate.

Without court expansion, there can be no restoration of democracy, no protection of rights, no rebuilding the destruction of the Trump era, as every legislative attempt will either be blocked or overturned.