Whether review under 28 U.S.C. §2254(d)(1) may consider evidence first introduced at a federal habeas evidentiary hearing.
Holding
No. When a state court has adjudicated a claim on the merits, §2254(d)(1) review is limited to the record that was before that state court.
Reasoning
Section 2254(d)(1) asks whether a state-court adjudication "resulted in" a decision contrary to, or involving an unreasonable application of, clearly established federal law. That backward-looking language requires a federal court to assess the state court’s decision when it was made, using the record available to that court at the time.
The limitation also follows from AEDPA’s structure. State courts are the principal forum for constitutional challenges to state convictions, and federal habeas petitioners ordinarily must exhaust their state remedies. Allowing petitioners to defeat a state decision through evidence presented for the first time in federal court would permit effectively de novo federal factfinding and undermine AEDPA’s commitments to comity, finality, and federalism.
The Court’s prior §2254(d)(1) cases focus on what the state court knew and did, including whether it reasonably applied governing law to the facts before it. It would be incoherent to call a state court unreasonable for failing to apply federal law to facts it never had the opportunity to consider.
This interpretation does not make §2254(e)(2), which regulates federal evidentiary hearings, superfluous. Section 2254(e)(2) still restricts hearings on claims not adjudicated on the merits in state court and may apply after a petitioner has cleared §2254(d)’s threshold. But a petitioner whose claim was adjudicated on the merits must first satisfy §2254(d)(1) on the state-court record.