Montour, Iowa -- After candidate entries and candidate withdrawals, debates and debate-related controversies, campaign surges and campaign duds, and tens of millions spent and tens of millions wasted on broadcast advertisements, we finally have reached the actual election year. No one expected Donald Trump to retain his high poll ratings. No one expected Gov. Scott Walker of Wisconsin to bomb. No one expected terrorism to emerge as a top issue. No one expected Republican politics to be so riveting. But while some of the candidates have been on a fool's errand, 2015 was not a bootless errand. It taught us...