Before Sarah Palin became the embodiment of the conservative grassroots, another national candidate from a state beginning with "A" mastered 21st century Republican populism on his way to winning the 2008 Iowa caucuses. During the campaign, former Arkansas Gov. Mike Huckabee, the funniest Republican since the heyday of Bob Dole, would go off on little-guy riffs like this: "If you're a person for whom 'summer' is a verb, if you went to Harvard or Yale, you probably think the economy is doing just dandy." After John McCain won the nomination, Huckabee did not fade away. Instead, he morphed into a...