I know MSNBC is the "liberal news network" now, despite the fact that it spends mornings with former conservative Republican congressman Joe Scarborough and most of the rest of the day as a neoconservative/Bush Administration rehabilitation platform, but once upon a time CNN was the "liberal news network." It's quite amazing how many people from that era have moved seamlessly to Fox.
Sure, Lou was always on the conservative side at CNN, but there have been others. Bill Hemmer, John Roberts, ...