From MRC's NewsBusters blog: On Wednesday’s NBC Nightly News — a broadcast that has yet to mention the infamous comments of ObamaCare architect Jonathan Gruber — anchor Brian Williams conceded his profession “might be guilty” of bias in its coverage, but his admission had nothing to do with liberals and conservatives. Instead, Nightly News devoted nearly two minutes (1 minute, 56 seconds) to a study showing media bias in favor of — wait for it — dog stories. “On this one we just might be guilty,” Williams confessed.