The Iowa caucuses are seven weeks away. Donald Trump is still the Republican front-runner. Sen. Marco Rubio is, for now, the establishment’s best (only?) hope. And Sen. Ted Cruz is the guy who looks best positioned to win. Yes, you heard that right. Cruz (R-Tex.), as of today, has the most direct route to the Republican presidential nomination — assuming that the past history of GOP nomination fights works as a broad predictor of where the 2016 race is headed. Let me elaborate. 1. Cruz is positioned as the most conservative candidate in the race. Although Trump gets all the...