Anderson Cooper's Mea Culpa

Having just returned from viewing a musical with my wife, I haven't seen the CNN/YouTube debate yet... I'll get it in soon. But a quick glance at the post debate coverage leaves me completely unaware of the debate's content, yet fully understanding CNN's mistake in airing a question from a retired Brigadier General Keith Kerr without disclosing his close ties to the Hillary Clinton Campaign. Surprising? Not really... but it seems to have surprised Anderson Cooper, whose acknowledgment and quasi-apology you can see appropriately enough, on YouTube.