Around Washington, D.C., if you mention Iowa, the first thing that will pop into most people's minds is "caucuses." But in Iowa, if you asked a local about the matchups, he'd most likely assume you were talking about wrestling. That's right, the non-metaphorical, sweaty, rough-and-tumble on the mat sort of wrestling. This year's Iowa state championships attracted attention nationwide when the promising high school sophomore Joel Northrup (the fifth-ranked wrestler in the state) defaulted on his first match. He had drawn Cassy Herkelman, a female freshman, as his opponent, and he could not, in good conscience, wrestle a girl. Northrup's...