AJ-Strata asks a good question about whether conventional wisdom even applies any more.
I think it really doesn't. In essence, if George W. Bush made one mistake after 9/11, it was not making things clear to his political base that the situation had changed, and they'd better be ready to adapt it - even if it meant howls from the punditry, the talk show hosts, and other self-appointed commissars.
Even so, it was not apparent at the time that failing to do that to his base was a mistake. There were no visible signs of a problem until 2005-2006, and by then, it was too late.
But the GOP in general seems to be tired of this, and is adapting. The top two declared candidates are men who are known more for their track records of solving problems and getting things done than their ideological purity. Both are pretty damn brilliant, too.
For all intents and purposes, the commissars are being screened out by the GOP primary electorate - simply by who leads the Presidential race.
That's good news, if you ask me.