People seem to be talking past each other quite a bit on whether or not, as conventional wisdom would have it, the United States is a "center-right nation." The question is sort of clumsily put, but nonetheless there is a lot of pontification on the subject at the moment and people seem to be drawing contradictory conclusions.
One reason for this confusion is a common but little-known analytic effect that has to do with the coarseness or fineness of one's view of the situation.
It's important, first of all, to make it clear that when I say "coarse" and "fine" I'm speaking in a purely non-pejorative sense. "Coarse" does not mean "crude" here. Here's a broad example:
Imagine you were an alien trying to answer the question "what's Earth like?" The first thing you might do is look at the earth from very far away. This would give you the reasonable, correct impression that the Earth is mostly water, and that in general the Earth is dominated by marine activity - water plants, fish eating water plants, swimming predators, etc.
If you took a closer look and actually came down to Earth, though, you'd find that Earth also includes a vast, technologically developed species that lives entirely on land. You would probably conclude from this that Earth is best described in terms of the activity of human beings, despite the fact that this seems to contradict your previous evaluation.
If you took a still finer view of the situation, you would realize that in fact in terms of the sheer AMOUNT of activity the Earth is dominated by two species - ants on land and krill in the oceans. Of course at a microscopic level all this would be dwarfed by bacteria and protozoans...
Which one of these answers (if any) would be most useful to your imaginary alien species depends largely on the context - that is, WHY you wanted to know what the Earth was like. But regardless of which answer you decided was best, they are not contradictory in any meaningful sense. They are all true.
The same is true of "how conservative is the US electorate?" question. The coarsest possible way of investigating this question is perhaps "if you asked everyone in the US whether they are conservative, moderate, or liberal, how would they answer?" And in that case it's been true for many years that far more people would say they are conservative than would say they are liberal.
At a slightly finer level, you could look at people's voting patterns and assign their electoral choices "Left," "Right" and "Moderate" and see how they voted - that would probably reveal, in a sense by definition, that people are pretty evenly split between liberalism and conservatism.
Or you could go down much finer to an actual policy level and assign various policies a place on the political spectrum and see how much support they got. In this last case you would find that Americans are mostly wooly-headed leftists, because in general popular opinion is very supportive of government spending, non-interventionist foreign policy, and other things that are associated with the political left. Just about the only left/right policy question that consistently comes down on the conservative side is "do you want taxes to be higher?" and even then if you structure the question in a certain way ("do you want other people's taxes to be higher?") you get a "liberal" answer.
The funniest part about all of this is that it reveals perhaps the most mundane conclusion possible - that the most effective way to remain popular as a politician in the US is to be thought of as generally "conservative," be identified with whichever party is popular at the time, and to pursue generally liberal policies while keeping taxes low on the large majority of the population.
George W. Bush governed this way - and it worked in the sense that he got reelected. Unfortunately in the medium-term, all his policies turned out to be giant failures, so now he's really, really unpopular.
So in conclusion, you can see that in America you should get elected when your party is popular, then implement policies that work out well. Not exactly an earth-shattering conclusion.