CNN's slide into the spinning toilet drain started as soon as they stopped focusing on the news, and started focusing on the repercussions/reactions to the news. They figured the reactions bring more popcorn than the news story itself. Their coverage of State Dept's handling of Libya was deplorable. Basically bringing partisan morons from the other side to blast the State Dept nonstop, rather than investigate and find out (like NYTimes did) why the State Dept was giving conflicting reports. It turns out that basically CIA was feeding information to State Dept as things were happening. Why couldn't CNN do this simple investigation task? Another example, they have squiggly meters that judge undecided voters' reactions on the fly during debates. This is not only wholly unnecessary, but distracts you, the viewers, from focusing on what the candidate is saying and makes you looking at the squiggly lines (the reaction to what the candidate is saying). It's just bad business. They've turned into the bookies that bet on horse races (not necessarily presidential race, but any major event), examining and hedging every reaction to the event.
CNN International on the other hand is solid. Please do support it if you live outside the US.