CNN posts its worst ratings in 21 years

More bad news for CNN, as its primetime ratings sink to a 21-year low during the last quarter. Dateline Hollywood says the woe is spread across the board during primetime. And how’s this for timing? Wolf Blitzer’s “Situation Room,” which expands to a third hour starting Friday, is down 26 percent overall and 42 percent in the coveted 25-54 demographic.