To hear President Obama tell it, Slurpees are the beverage of choice of obstructionist Republicans. In each of 20 political speeches over the last two months, Mr. Obama has included a riff in which he portrays GOP leaders as sipping Slurpees while hard-working Democrats struggle to pull the economy out of a ditch. "We're down there. It's hot. We were sweating. Bugs everywhere. We're down there pushing, pushing, pushing on the car. Every once in a while we'd look up and see the Republicans standing there. They're just standing there fanning themselves -- sipping on a Slurpee." The line never...