Regarding constitutional errors, as is evident from the above quotation from Kotteakos, "departures from "constitutional norms" originally received different treatment under the harmless-error rule. Following
Kotteakos, law7ers, courts, and commentators appear often to have accepted that there could be no harmless constitutional error, and numerous
Supreme Court opinions supported this assumption. An academic stated "The Supreme Court initially applied the new federal harmless
error rule only to non-constitutional errors, and prior to 1967, the Supreme Court routinely reversed convictions upon a finding
of constitutional error." (Charles J Ogletree, Jr "Arizona v Fulminate: the Harm of Applying Harmless Error to Coerced
Confessions' 105 Han-ard Law Review (1991) 152 at 157) However,