WILLIAM M. ARKIN – January 4 is my last day at NBC News and I’d like to say goodbye to my friends, hopefully not for good. This isn’t the first time I’ve left NBC, but this time the parting is more bittersweet, the world and the state of journalism in tandem crisis. My expertise, though seeming to be all the more central to the challenges and dangers we face, also seems to be less valued at the moment. And I find myself completely out of synch with the network, being neither a day-to-day reporter nor interested in the Trump circus.