I don’t see that happening my FRiend... however what I do see happening IF we actualy put McCain in the WhiteHouse is a HUGE step backwards.. because the conservative congress will feel “obligated” to support the “R” in the WhiteHouse..
Whether you personally see it happening or not, it could happen. And in the meantime, as I said before, you will be rooting against America and praying something bad happens to our nation. Otherwise your strategy will fail.
Let's look at it from the other angle. If McCain wins the White House then either he will at least rise to a level that is acceptable to the conservative base (in which case no harm no foul) or you will have 4 years to mobilize an effort to unseat him in 2012. If he does as badly as you think he will then that would likely be a lot more probable than taking on Clinton/Obama after 4 years of satisfying their base.
If you really want to look to 2012 as your next chance to shift the Republican party to better match your views you would have better luck against McCain than either of the Democrats.