My answer to that is “what conservative isn't?” The question that I have is what is more important, the future of the Republican party or the future of America? It reminds me of that quote during the Vietnam War when a general was asked why some city was bombed and his reply was “We had to bomb them to save them.” So your solution to this election dilemma is to risk the possible short and long term destruction of our country at the hands of a boy amongst men on the world stage to save the Republican party!?
If McCain wins, he will move the GOP further to the Left and marginalize conservatives even more. After all, he proved he could win the Presidency by appealing to independents and moderate Dems. As I said, it is a Faustian bargain. If you sacrifice principle to be more like the Dems, what do you have left?