Cliqueishness and Tribalism on Twitter

John Cole at Balloon Juice says everything there is to say about it (though, if you're not a Twitter denizen, his post requires some backstory). If you're not on Twitter...count yourself lucky. OK, not really. What I was going to say is: if you're not on Twitter, what's been happening for a while now is that a group of Twitter users who are interconnected both on and off Twitter have had the long...