Why would he attend if it was a victory party for the frickin’ RINO a**hat McCain?
Except he implies that he WANTED to attend, but wasn't invited. Either he is lying, or he is an idiot.
My guess is he told exactly the truth, that he didn't receive a written invitation in the mail that made it to his desk.
Maybe he was miffed because he got an oral invitation, and that McCain didn't call him personally or something. I don't know -- but I can't imagine the republicans would have NOT invited him to the event, since winners are always looking to make sure the losers are mollified so their supporters don't get the impression they are not wanted.
Which I presume is what Hayworth is trying to do here, get credit for not being at the rally, while also pretending he wasn't invited, to stir up his supporters.