Before getting to the oral argument of December 2 in Edwards v. Vannoy, a basic explanation of the rule of Teague v. Lane is in order. To understand the rule, and to understand why it has an exception that is never met, one needs to know the background.
Before Teague, the Warren Court had established a three-prong test for when a rule would be applied retroactively to earlier cases. The Court was making up new rules at a brisk pace, so this question was important. The majority that created this approach to retroactivity, initially, was a coalition of the more pragmatic members of the liberal wing of the Court, including Chief Justice Warren and Justice Brennan, who saw non-retroactivity as a way to reduce resistance to changes they thought were needed, and the relatively conservative justices who saw it “as a way of limiting the reach of decisions that seemed to them fundamentally unsound,” as Justice Harlan put it in his separate opinion in Mackey v. United States, 401 U.S. 667, 676 (1971). Continue reading . . .