Below: comment at sourced article
“The real change in the character of the Republican Party was caused by the elimination of the Fairness Doctrine. This transformed AM radio — which had its share of right-wing cranks but was generally an apolitical general-information medium — into a national right-wing propaganda network of fact-free paranoia and manufactured partisan outrage.
With the addition of Fox News, Republicans began living in their own propaganda bubble completely divorced from reality and immune to logic, historical fact and scientific evidence.
As a result, middle-class Republicans supporting policies such as a flat tax, which will reduce taxes for billionaires while raising their own, are as brainwashed as North Koreans enthusiastically cheering their Dear Leader.”
http://www.salon.com/2013/08/31/the_conservative_crackup_how_the_republican_party_lost_its_mind/
Given how high the odds are stacked against them, it's a wonder to me how any conservatives are elected at the national level.