The Obama campaign is struggling to respond to mounting criticism of Vice President Joe Biden's bizarre behavior during last night's debate with Rep. Paul Ryan. Biden not only interrupted Ryan frequently--82 times, according to Republican National Committee chair Reince Priebus--but frequently laughed, smirked, and snorted at serious moments, showing contempt for his opponent and disturbing even friendly observers. A CNN poll conducted after the debate, which handed Ryan a narrow 48%-44% victory, also showed that Ryan had beaten Biden by an even wider margin when it came to "likeability." Viewers in the poll--with an admittedly small sample-- also said Ryan...