“The fact that Wisconsin has historically been strongly pro-union — indeed, the largest public services employee union, AFSCME, was founded in Madison in 1932 — only makes Walker’s triumphs that much more impressive to his fellow Republicans. This is something Walker will undoubtedly highlight if he runs for president. As he put it in his 2013 book, “Unintimidated,” “If we can do it in Wisconsin, we can do it anywhere — even in our nation’s capital.”