In Heller the opinion of the Court was delivered by Scalia.
That said, Heller upheld the 2nd Amendment over the DC ban, ergo Fed > DC = Fed won.
Roberts voted in favor of Heller and Heller held that gun bans in areas controlled by the feds are unconstitutional. Heller further held that individuals have a 2nd amendment right to keep and bear arms. How on God’s green earth do those rulings expand the power of the federal gov’t?