There is a lot to like about McCain, but some of his positions aren't conservative.
I've yet to see a candidate whose name couldn't replace "McCain" in this sentence.
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I see McCain as the best of our options this cycle. I don't care for McCain-Feingold. I'm not 100% sure what you mean by "his record against Industry;" I'm not aware of any consistent anti-business record he has. As for the "for enemy combatants" dreck, I just can't get on-board with any line of thinking that identifies a remarkably bellicose candidate who happens to oppose torture as "pro-enemy-combatant."
Even if I agreed (aside from McCain-Feingold) that his record on these issues were blemishes, none of them strike me as a disqualifying problem. His record on free trade is excellent; I like his positions on health care, social security, and the war going-forward; and he seems to be one of the few candidates who can repair some of the fracturing of the conservative movement.
All of those issues seem to me to be far more urgent and important than whether McCain would waterboard an enemy combatant who knew the shutdown code of the Ticking Bomb.
The one thing that does trouble me a bit about McCain is the scuttlebutt claiming he's pretty intolerable behind the scenes. Still, if anything, that would seem to indicate that he might be a weak executive, and, after the last 15 years, I'm pretty much fine with that prospect.