Holding: By taxing the federal pension benefits of U.S. Marshals Service retiree James Dawson, while exempting from taxation the pension benefits of certain state and local law enforcement officers, West Virginia unlawfully discriminates against Dawson as 4 U.S.C. §111 forbids.
Judgment: Reversed and remanded, 9-0, in an opinion by Justice Gorsuch on February 20, 2019.