Herman Cain also brings a Detroit-themed ad to the debate in Michigan tonight. The video intersperses clips of the speech he gave in Detroit last month explaining the “opportunity zone feature” of his 9-9-9 tax plan (which he says would mitigate its impact on poor Americans) with shots of Detroit in various states of abandonment and decay (including one picture of what appears to be an art installation by the street artists Hygienic Dress League that reads “DETROIT REVOLUTION! coming this summer”).