Our source has further elaborated to us that MSNBC also didn’t like the fact that parts of the show seemed to be skewering left-leaning media.)

Interestingly, the lead character (to be played by Jeff Daniels) is a passionate, liberal Keith Olbermann–esque character who comes off as a jerk. Since Olbermann left MSNBC on bad terms (and, in his press rounds for his new Current TV show, missed few opportunities to take shots at his old home), you’d think execs would welcome the chance to have Matthews be part of a show that tweaks him back. We asked reps for MSNBC and Matthews, but they had no comment. HBO also declined comment, noting More is still in the pilot stages and that neither Matthews nor Breitbart have ever been confirmed as cast in the project.