I read this on another forum. I thought he summed it up very well:
McCain may be a jerk, but he's not a committed leftist who would redistribute wealth, kill live children who survive abortions, nationalize healthcare, grab guns, bankrupt the coal industry, create a "Civilian National Security Force," decimate talk radio etc.
McCain didn't grow up a Muslim and look to world-class Marxists as his mentors. McCain didn't sprout out of nowhere from Chicago thug politics and attain the dubious distinction of being named the most leftist politician in the U.S. senate.