Bernie throws his hat in

Why Bernie Sanders running for President is great news for Democrats

Glad to hear he's running. Of course, a Sanders presidency would almost certainly be no less disappointing than Obama's - he's playing to an audience as much as any other politician, and the realities of the US political system make meaningful change from within all but impossible. At any rate, he's unlikely to be a real contender, but he's got a big enough support base in the party (especially once Elizabeth Warren gives her endorsement, which seems likely) to seriously outflank the Clinton campaign on the left and force them to seriously engage with the inequality issue. I don't expect anything that's said during the campaign to translate directly into actual Clinton administration policy, but anything that raises the visibility of the issue is a positive.