I don’t know if I would call Detroit most liberal. Ann Arbor and Kalamazoo both put Detroit to shame in the liberalism department.
Detroit has the most corrupt greedy leadership combined with an apathetic lazy population.
I didn’t get that list from this site, but........
Ann Arbor has the Greenie Weenie Peacenik Blame America First Liberals.
Detroit and Flint have the 1930’s Huey Long, Woodie Guthrie and Union Newsletter Economic Liberals.