636
Opinion of the Court
plied on direct review of petitioner's Doyle claim also applies in this habeas proceeding. We are the sixth court to pass on the question whether the State's use for impeachment purposes of petitioner's post-Miranda silence in this case requires reversal of his conviction. Each court that has reviewed the record has disagreed with the court before it as to whether the State's Doyle error was "harmless." State courts are fully qualified to identify constitutional error and evaluate its prejudicial effect on the trial process under Chapman, and state courts often occupy a superior vantage point from which to evaluate the effect of trial error. See Rushen v. Spain, 464 U. S. 114, 120 (1983) (per curiam). For these reasons, it scarcely seems logical to require federal habeas courts to engage in the identical approach to harmless-error review that Chapman requires state courts to engage in on direct review.
Petitioner argues that application of the Chapman harmless-error standard on collateral review is necessary to deter state courts from relaxing their own guard in reviewing constitutional error and to discourage prosecutors from committing error in the first place. Absent affirmative evidence that state-court judges are ignoring their oath, we discount petitioner's argument that courts will respond to our ruling by violating their Article VI duty to uphold the Constitution. See Robb v. Connolly, 111 U. S. 624, 637 (1884). Federalism, comity, and the constitutional obligation of state and federal courts all counsel against any presumption that a decision of this Court will "deter" lower federal or state courts from fully performing their sworn duty. See Engle, supra, at 128; Schneckloth v. Bustamonte, 412 U. S. 218, 263-265 (1973) (Powell, J., concurring). In any event, we think the costs of applying the Chapman standard on federal habeas outweigh the additional deterrent effect, if any, that would be derived from its application on collateral review.
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