Federalism first principles

“Litigation about litigation,” usually in the form of a federal suit to enjoin or otherwise overcome a state-court case, can involve complicated federalism concepts such as the Rooker-Feldman doctrine or Younger abstention. The Fifth Circuit reiterated an even more basic principle in Machetta v. Moren, in which an unhappy party to a state court child custody case sought to assert civil rights claims against the judges: “The district court [correctly] dismissed the case because no case or controversy exists between ‘a judge who adjudicates claims under a statute and a litigant who attacks the constitutionality of the statute.'” No. 17-20533 (June 4, 2018, unpublished).