Read 'the authoritarians' by bob altemeyer or 'conservatives without conscience' by John Dean.
Authoritarians (who tend to be right wing and conservative) literally do not use logic as much as non-authoritarians when they are making decisions. They are dogmatic, hostile, misinformed, irrational and don't use common sense or logic. And sadly they make up 20-30% of the public.
I urge anyone who thinks I am lying or exaggerating to read Altemeyer's book (available free on his website), esp chapter 3. Altemeyer is a world leader in the psychology of authoritarianism (a huge subject after the Nazis rose to power)
http://members.shaw.ca/jeanaltemeyer/drbob/chapter3.pdfSo no matter how bad the GOP screws over america, how incompetent they are or how dangerous they are, 20-30% of the public will always vote for them (these are the same people who believe in creationism but reject global warming, just to give you a perspective on their thinking processes). We have to work hard to make sure they can't consistenly gain more than 48% of the vote by building the progressive base and GOTV drives.