William Cooper, the brash, outspoken chairman of TCF Financial Corp. in Minneapolis, grew up in a Democratic household, had a father who belonged to the United Auto Workers, and worked his way through college walking the night beat as a Detroit cop.

Despite that background, Mr. Cooper was elected chairman of the Minnesota Republican Party this month, promising to infuse the organization with a new enthusiasm and firebrand conservatism.

Subscribe Now

Access to authoritative analysis and perspective and our data-driven report series.

14-Day Free Trial

No credit card required. Complete access to articles, breaking news and industry data.