For years I have been trying to persuade supporters of the other major American party to change their mind and vote with me, to no avail. That is, until last week, when three politically minded friends came over for an evening of snacks and politics, and, halfway through the evening, I unleashed my new one-two approach to political persuasion.

First, I asked my friends how they would go about choosing a new dishwasher. We agreed that the responsible and rewarding method would be to ignore any marketing hype and instead follow the Best Buy recommendations by Consumer Reports. Because nobody mentioned the virtues or shortcomings of, say, Whirlpool’s executives as a valid criterion for choosing the appliance, I asked why they argue for hours about the perceived personalities of the candidates instead of comparing the track records of the major parties. My friends answered that it’s simple enough to summarize the essential properties of dishwashers, while the elections are about a large number of issues that defy easy tabulation. Therefore, they concentrate on the candidates, hoping that by choosing the right person for the job, the elected official will make the right decisions when dealing with all those different issues.

I used […]