Having split with Sony after insisting that her second album be a double-disc set like her first, this New York singer/songwriter/pianist knocks out her third, a brisk nine-song set that plays like the breathless first act of a stage musical decrying American fascism. Backed by jazz vets who amplify the hairpin turns of McKay’s manic melodies and labyrinthine lyrics, this justified ham spits out pun-filled, potty-mouthed social commentary as flügelhorns honk and xylophones tinkle.