McCain has proven he is not friend of the GOP but only McCain time and again. Why would any of us support him over a Rudy or most any other pubbie that runs?
He may be viable and might even win but McCain emulates most everything we don't like here at FR.
If McCain were only looking out for himself, he would not have taken the unpopular positions he has, especially on the WOT.
He may be wrong sometimes, he may get angry and fly off the handle a bit. But he'll look out for the national security of this country like no other potential *viable* candidate, other perhaps than Rudy.