Reagan's sunny disposition and his willingness to compromise masked the McCarthyite elements of his appeal, but Reaganism as an electoral device was unique to Reagan and essentially died with the end of his presidency. McCarthyism, on the other hand, which could be deployed by anyone, thrived. McCarthyism was how Republicans won. George H.W. Bush used it to get himself elected, terrifying voters with Willie Horton. And his son, under the tutelage of strategist Karl Rove, not only got himself reelected by convincing voters that John Kerry was a coward and a liar and would hand the nation over to terrorists, which was pure McCarthyism, he governed by rousing McCarthyite resentments among his base.
Republicans continue to push the idea that this is a center-right country and that Americans have swooned for GOP anti-government posturing all these years, but the real electoral bait has been anger, recrimination and scapegoating. That's why John McCain kept describing Barack Obama as some sort of alien and why Palin, taking a page right out of the McCarthy playbook, kept pushing Obama's relationship with onetime radical William Ayers.
And that is also why the Republican Party, despite the recent failure of McCarthyism, is likely to keep moving rightward, appeasing its more extreme elements and stoking their grievances for some time to come. There may be assorted intellectuals and ideologues in the party, maybe even a few centrists, but there is no longer an intellectual or even ideological wing. The party belongs to McCarthy and his heirs -- Rush Limbaugh, Sean Hannity, Bill O'Reilly and Palin. It's in the genes.
If it keeps moving in that direction look for the national party to look more and more like the Tennessee GOP.