Comments on Rooker-Feldman or Let State Law Be Our Guide

I feel privileged to have been asked to be a commentator on the three principal papers in this symposium. These are three excellent papers, and although there has been some valuable commentary on the Rooker-Feldman doctrine, there will be no need to go beyond these papers to gain a full appreciation of the doctrine, its applications, and its problems, which run as deep as the problems of any doctrine.