Alright, I know we aren't going to make Romney king, even if he wins the election, which at this point, I believe is entirely likely. But that is not really the point of this cartoon.
I see the middle class as now composed of a great number of people who cannot be expected to vote in their own interest, who cannot be expected to think about constructing the future. They are so busy trying to cling to whatever it is they now have - to preserve their shaky hold on simple prosperity - to be expected to look at the future as a better place. I suppose they hope that someone will magically fix things in the long run, someone else, of course.
There is no point in pretending that most of the people we are talking about are not the white people. These are the folks who let their industries move away, who saw their state and federal treasuries looted by the economic aristocracy, and who now sit back lackadaisically and watch their public schools being destroyed. In fact, many of these white people have gladly contributed to the demise of their institutions because they hate other races so much. They never wanted those minorities in their neighborhoods, their schools, their unions, or anywhere else near to them. Now their very democracy is sliding away.
So, welcome king Romney! not as an ordinary king, but as a representative of a class who are now seizing the United States.