Daniel Casse: " After Ted Kennedy's endorsement, the only question is when Al Gore will throw his support behind Barack Obama. "Don't think for a moment that Gore isn't considering it. What happened this weekend was the most dramatic change of tenor we have seen since Iowa caucus night. A new front opened up in the Democratic primary race. Hillary Clinton is no longer just battling Obama. She is defending the legitimacy of the Clinton era against all those who know it and are sick of it. A Gore endorsement of the rival to the wife of the man who made him vice president would be an unprecedented blow." It also makes perfect sense. Gore's endorsement of Dean in 2004 signaled his rejection of the Clintons and Clintonism. And Gore's embrace of transnational progressive issues like climate change, and of course his longstanding opposition to the war, puts him closer to Obama's foreign policy than Clinton's.