I think Rush is a major factor....and in fact had a part in the show for several years....and have listened since the very first week he was on air nationally. But I think you’re way over estimating his impact on this history.
Romney was closer to Reagan in his 08 CPAC speech (right after dropping out) than at any other moment in his life. That speech was pure Reagan, pure free market, pure freedom. He was NEVER that man again, regardless of some cynical flipping and flopping and his stupid “severely conservative” remark - which was not true.
I’m not talking about his effect. Only his intent and efforts.