He didn’t single handedly lose it.
There was a decision by GOPe to work against him.
They used the one comment as an excuse.
Why leave out the conservatives, the tea parties and Palin all trying to get him to drop out? They clearly saw him as losing the race.
Most conservatives asked him to step down as well as the gope. You’re not remembering how many wanted him to step down. They were right, he was a pig to the slaughter.