From "Trump overshadows Republican debate even as he sits it out."
ADDED: Nielson gave a 8.4 household rating to the debate (that is, 8.4% of American metered market homes watched.)
By comparison, two of the cable channels that showed parts of Trump's event, CNN and MSNBC, had about a quarter of Fox's audience combined.Yeah, but savvy people watched on C-SPAN, where you could actually watch the event, not just parts, so that comparison is pretty weak. And there have been 6 other debates, 5 of which had household ratings from 8.9 to 15.9. (The 6th was on Fox Business Network and had 7.4.)