We already sort of knew this, but now it’s officially official. And thus does the 2012 primary season begin, my friends.

Two important questions now. One: What’s his role in the Arizona shootings? We’re all guilty, apparently; surely there must be an inflammatory soundbite somewhere in the Cain radio oeuvre that the left thinks somehow got beamed into Loughner’s brain. Two: Remind me again, how is he going to compete with Palin and/or Huckabee in Iowa? This PPP poll from yesterday shows the two of them at the top of the pack and each standing to benefit heavily if the other doesn’t run. His conservative credentials may be sterling, but where’s Cain’s entry point into that race?