A federal appeals panel exchanged arguments Monday with lawyers over a still-unresolved November election for a North Carolina Supreme Court seat, immersed in jurisdictional questions over which courts should determine whether roughly 66,

The lawsuit is proceeding in state and federal court at the same time, a rare occurrence that mirrors the rare nature of the attempt to throw out ballots months after the election ended.

The 4th U.S. Circuit Court of Appeals will hear arguments Monday about whether federal or state courts should handle the case.