Aaron Sorkin once chronicled the daily work of the federal government in "The West Wing." In "The Newsroom," the Emmy-winning executive producer uses the operation of a fictional cable news network as the heart of the story, with Jeff Daniels portraying the network's lead anchor and leading an ensemble cast. Episodes are written around actual recent news events, reported by a staff that takes its collective responsibilities seriously, but corporate and commercial obstacles -- plus entangled personal relationships -- fly in the face of their public mission