03/24/2015 09:56 am ET

Billionaire's Dark Money Contribution To Scott Walker Pays Off Big Time

Richard Ellis via Getty Images

John Menard Jr. is widely known as the richest man in Wisconsin. A tough-minded, staunchly conservative 75-year-old billionaire, he owns a highly profitable chain of hardware stores throughout the Midwest. He’s also famously publicity-shy — rarely speaking in public or giving interviews.

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