He really blew his credibility pushing the “Russia isn’t going to attack” propaganda line (ostensibly, as his own independent analysis of the situation), and his last tweet (3 days after the attack, his prior being 3 days before) was:

“I’m not suspended from the ceiling above a barrel of acid by a rope that burns a little faster every time I tweet, you concern-trolling ghouls. I’ve just lost any confidence I had that sharing my thinking on this particular topic continues to be useful, because I called it wrong.”