Other than 1992, when Bush the Elder drifted left and it split the party. That history thingy ... yet again.
What happened in 1992? A lot of conservatives defected to Perot, is that what you're saying?
It's always the fault of the voters. Never the fault of the Rockefeller wing of the party who keeps trying to yank the steering wheel to the left, even though that manuever is shown to be bad for the party.
Voters who make dumb choices are dumb. I see no point in pretending otherwise.