Except when Scalia is putting Wickard v Filburn on steroids to fight the demon weed: "Where necessary to make a regulation of interstate commerce effective, Congress may regulate even those intrastate activities that do not themselves substantially affect interstate commerce." - GONZALES V. RAICH (03-1454) 545 U.S. 1 (2005) (concurring)
Scalia’s vote on South Dakota v Dole was bad too.