The voting popultion is actually a minority, iirc. And what is a choice when the answers are pre-determined? (Guaranteed red or blue state making your vote worthless thanks to FPTP, disenfranchisement via more localized gerrymandering with voter districts, Florida 2000, etc.). The inputs are somewhat predetermined too, by media coverage, by advertising dollars (money spent is extremely well correlated with elections won) etc.
I maintain that most people have not made a significant political choice, outside of local elections for city and county.