I suspect McClintock support on this site is just about 100%. He appeals to just about all factions of the right of center voters, because he is just so damn smart, articulate, knowledgeable (the guy is a walking wikipedia when it comes to California finance) and honest. What you see, is what you get, and he answers all questions with authority and persuasiveness. He is also a nice guy, with a good sense of humor.
To use a physobabble term, the guy is "centered," which is more and more a rarity these days in politicians. Far too many are head cases, and just too involved in the power game because it feeds their egos.