Rand is playing the game. He is ambitious.
Indeed he is. But if Rand is going to raise the "hypocrisy" card against others, its perfectly reasonable for another Republican to bring up the fact that Rand presented himself as an anti-establishment Tea Party candidate to get himself a Senate seat, then turned around and endorsed the ultimate GOP insider over his Tea Party rival.
The question is whether any Republican candidate on stage with Rand would go down that road. My guess is they don't have the balls to bring it up.