If you haven't already heard, my good friend and colleague Marc Ambinder is leaving The Atlantic--but I won't get weepy and emotional about it because he isn't going very far: down three floors to our sister publication to join the revamped National Journal's revamped White House team. But Marc will, sadly, be ending his blog, which has been required reading for anyone who follows politics (especially those who also happen to be interested in professional wrestling, bariatric surgery, neuroscience, and police scanners). You can--and should--still follow him on Twitter. He's @marcambinder. Best of luck to him.