On today's show Rachel is going to be talking to New York Times' political writer John Harwood about his new book, Pennsylvania Avenue: Profiles in Backroom Power.

Also, we have reason to believe that John Edwards is going to be endorsing Barack Obama at approximately 6:30 pm ET.  We will carry that live.  And then Rachel will talk to her politcal guru David Bender about they why and the when on this endorsement.