Maybe.
Would he have gotten it anyway?
I give you 2006.
Will this actually lose him votes?
Probably; it will depend upon how Cunningham responds. There are people who call talk shows daily. Nobody knows how much the effect will be. Were I one of McCain's people, I'd be on the phone begging for forgiveness.
IMO it won't happen; this is an Islamic Marxist's election to lose in a Bob Dole redux because McLame will do the famed RINO swan dive.
You can thank the RNC.
Oh? So it's not the fault of conservatives that they have squandered their authority and influence to the point where we can't even field a viable candidate? "Blame somebody else" is awfully easy -- but really, it's just proof that we're our own worst enemies.