I. When harmless-error review of Erlinger error requires consideration by appellate judges of facts neither intrinsic to nor relevant to the finding of guilt for the simple § 922(g)(1) offense, is Erlinger error structural?

II. If a preserved claim of Erlinger error is instead amenable to harmless-error review, what is the proper test and corresponding scope of review when the defendant has pleaded guilty only to the lesser offense under § 922(g)(1)?

When harmless-error review of Erlinger error requires consideration by appellate judges of facts neither intrinsic to nor relevant to the finding of guilt for the simple § 922(g)(1) offense, is Erlinger error structural?