The center is right of the center

On Wednesday, John McCain reiterated a meme he spread on the campaign trail:

Look, look, there is no doubt in my mind America's a right-of-center nation and this administration is governing from the left. [link]

I've been trying to wrap my mind around that, mathematically. It sounds to me like he's saying that the average American is to the right of the average American (which could get very awkward when trying to plan seating at dinner parties). The other option is the idea that there are fixed endpoints to the political spectrum, a Left point and a Right point, defining an axis that we can use to fix the mood of the electorate, which is equally ridiculous.

Politically useful, though.