@joev - There's some real demographic/electoral problems with that thought. Closed early primaries and a winner-take-all system empower the R candidates that can generate the most buzz in short bursts, and that's not moderate R candidates (when's the last moderate R who even made it through that process, Eisenhower?). That and a lot of the moderate rationalists left the R party to the devices of the fanatics.
'10 taught moderate R's that if they don't get on board with "teh crazy", they're going to get primaried, and since a number of moderates were primaried out this last round, there's already chum in the water. The only way they're gonna put a stop to that spiral is for one of the R leadership to stand up and change direction. Which one of the feckless bunch do you expect it to be? Cantor, Boehner, McConnell? They ain't got no Lyndon Johnson over there...
Their one shot, minus a major change in US fortunes, might be what's left of the business side of the R establishment drafting Petraeus, but it isn't the 1950s anymore.