Detroit, Chicago, Boston, Toronto, New York and Montreal. There was a Pacific division up to about 1920 something, but for 40 years the Big 6 ruled. Say, 1920 to 1960. Not that the Mob had anything to do with it (James Norris, anyone?)
I love it when someone says Nazi=Socialist because they called themselves National Socialists. I guess North Korea is a democracy then as they call themselves a Democratic Peoples Republic. The Nazis killed communists and socialists and any other enemies.