Whether the Supreme Court had jurisdiction when the Delaware Supreme Court's automatic-reversal rule might have rested on independent state-law grounds.
Holding
Yes. The Delaware decision fairly appeared to rest on federal law, and it did not plainly state that its reversal rule rested on an adequate and independent state ground.
Reasoning
Under Michigan v. Long, the Court will not treat a state judgment as resting on an independent state ground when the opinion appears to rely primarily on, or is interwoven with, federal law and does not clearly say otherwise. The Delaware Supreme Court relied on federal and state authorities but did not identify a state supervisory power or state-law prophylactic rule as the basis for automatic reversal.
Because the Delaware court characterized its rule through federal Confrontation Clause doctrine and supplied no plain statement of an independent state basis, the Supreme Court treated the judgment as resting on federal law and could review it.