Antonin Scalia,
City of Columbia v. Omni Outdoor Advertising Inc…
“ We reiterate that, with the possible market participant exception, any action that qualifies as state action is "ipso facto . . . exempt from the operation of the antitrust laws," id., at 568, 104 S.Ct., at 1995. This does not mean, of course, that the States may exempt private action from the scope of the Sherman Act; we in no way qualify the well-established principle that "a state does not give immunity to those who violate the Sherman Act by authorizing them to violate it, or by declaring that their action is lawful." ”
