Actually, you're wrong. Most adult Americans fall into the category of non-partisan, middle-of-the-road. They go about their daily lives giving little or no thought to politics. They typically hold right-of-center views on some issues and left-of-center views on others.
Only a comparatively small percentage of adults are what might be called political junkies -- politically active and/or who pay close daily attention to the issues of the day. This is not just me talking. It's empirical data taken from a variety of sources, including ratings for TV news programs, talk radio shows, the rising number of voters registered as independents, studies, polls, and so on.
Nationwide, independents now make up roughly a third of the American electorate.