Its an article of faith among many Republicans that Mitt Romney is the most electable candidate in the GOP field. But its not clear that this assertion is actually true. In fact, if one were going to design a Republican opponent tailor-made to President Obamas liking, that opponent would be uniquely vulnerable to Obamas main rhetorical thrust (making class-warfare arguments), uniquely unsuited to take clear aim at Obamas least popular action as president (spearheading the passage of Obamacare), and uniquely strong in states that are unlikely to matter in the general election race.