Bill Richardson defends himself against the attacks from the Clinton camp following his endorsement of Obama, attacks which, he basically writes, confirm his endorsement:

I do not believe that the truth will keep Carville and others from attacking me. I can only say that we need to move on from the politics of personal insult and attacks. That era, personified by Carville and his ilk, has passed and I believe we must end the rancor and partisanship that has mired Washington in gridlock. In my view, Sen. Obama represents our best hope of replacing division with unity. That is why, out of loyalty to my country, I endorse him for president.

I think John Edwards is going to endorse Clinton at a strategic point in the next few months, to counter-balance Richardson's endorsement.