Hawk, Don, there are plenty of people who vote for Republicans, believing they are voting for "principles and competence." But many of them -- some of my own friends and family who are caring, responsible, generous people -- get pretty much all their "information" from Fox News (and some even from sources like Rush Limbaugh).    In addition to the right-wing opinion slant, they are also fed a lot of misinformation and disinformation and not exposed to other sources like the (shudder! "socialist-leaning" New York Times or network news) to counter that.

One group that is especially captive to this is residents of nursing and convalescent homes and some assisted living residences as well.   The vast majority of the time, the TVs in the communal areas are set to Fox News Channel, and even the TVs in the individual rooms may be set there (though the resident could theoretically change the channel if they were assertive enough).   Decisions like that are basically made by the owners and maybe sometimes the staff.   But these folks DO vote, with the assistance of the owners and staff and sometimes outside groups (which could be the League of Women Voters or could be a church group).

And as I've said before, many people have no access whatsoever to liberal-leaning talk radio programs and very limited access to "neutral" news shows either.