I think someone's past endorsements are entirely in play because its the only way you can see a pattern. Considering Sarah's other endorsements, dancing with the one who brung ya doesn't bother me (as much as I loathe McCain).
It should be noted that McCain has aggressively endorsed and campaigned for people like Scott Brown and it would not surprise me in the least that part of the agreement was to have them campaign for McCain if asked.
If you were Scott Brown back in December, how do you refuse?
So, I see the endorsement game as part of a “scratch-my-back-I’ll-scratch-yours” agreement that honorable people will choose to honor. Secondly, those in the Senate club protect their own which is why Senate Republicans choose Specter over Toomey, etc. Should they endorse the challenger and the incumbent still wins, the incumbent then has ammunition by which to punish some future legislative goals. It’s why Cornyn goes out of his way to support incumbent Republicans, even RINOs.
To me, political endorsements are like newspaper endorsements. Their only benefit to me is to tell me who I should vote against.
“Considering Sarah’s other endorsements...”
Rand Paul bothers the hell out of me too.