Mitch is an establishment Senator, but I think he sees the way the wind blows. He's buddying up with Rand out of sheer self-preservation. And THAT'S FINE BY ME, we need all the help we can get, even if it's motivated by polling numbers rather than principles. Meanwhile, a better target for a challenge in 2014 is Graham, who is so far up the arse of the MIC there's no chance of him ever turning our way.
Fight everyone all the time and lose, or pick your battles and win some.