Earl Warren,
Hanna v. Plumer — Opinion of the Court
“ When a situation is covered by one of the Federal Rules, the question facing the court is a far cry from the typical, relatively unguided Erie Choice: the court has been instructed to apply the Federal Rule, and can refuse to do so only if the Advisory Committee, this Court, and Congress erred in their prima facie judgment that the Rule in question transgresses neither the terms of the Enabling Act nor constitutional restrictions. ”
