McCain was the only POTUS candidate I can recall who endorsed his opponent for the office.
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Didn’t mitt basically throw in the towel and backhandedly tell what a ‘nice guy’ etc BO was and NEVER attacked him or his ‘ideas’.
If MR would have run as nasty a Presidential campaign as he did to get the nomination, he may have won....
But that would probably have been BO ‘light’ at the very best and it would never have dawned upon him to remove the BO ‘leftovers’...
Of the two, Mccain was way worse at the top of the ticket. GOP did horrible in that election cycle.