whether the principles enunciated in Younger v. Harris and its progeny require a federal court to abstain from deciding a federal preemption question

question presented is whether the principles enunciated in Younger v. Harris and its progeny require a federal court, having properly before it a claim that a federal statute preempts a state law, should abstain from the deciding the federal question of preemption because a state executive branch agency has initiated a civil administrative proceeding against the federal plaintiff solely under the state law. II. The question presented is whether the Court of Appeals erred by applying an abuse of discretion standard to a District Court’s decision to apply the abstention principle enunciated in Younger v. Harris and, therefore, erred in affirming the District Court’s decision.