I think that much of the paper should focus on how the election validated your thesis statement. It is going to be awkward to write a paper about how an election should reflect the better candidate when the election is over. Rather, your thesis could be substantiated with the demographic voting patterns that emerged between both the President and Governor Romney. Consider that the fundamental premise here is that the candidate that is more suitable for being President is the one who better represents his nation. In this emphasis, one can make a case that the coalition that elected the President is more reflective of what America is as opposed to the coalition that sought to elect Governor Romney. The President ended up being reelected because of demographics that emphasized more of what America embodied:
Using the same method, we find that 2 percent of Romney's voters were black, 6 percent were Latino, 2 percent were Asian, and 2 percent had some other ethnic classification. Obama's support was 56 percent white, 24 percent black, 14 percent Latino, 4 percent Asian, and 2 percent other.
The demographics that supported each candidate is more tilted towards the representation of what America is in the President's case. There is greater representation and, perhaps, this can be used as a point of emphasis as to how the election results sought to bear out how the President's election represents him as a more suitable candidate for the office of the President.