Comedian Rob Delaney's tweets about Mitt Romney are so popular that, at times, they get re-tweeted more than Romney's own tweets. Brooke speaks with Delaney about those tweets and the rise of Twitter in the world of political humor.

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For almost as long as there have been comedies on television there's been that old Pavlovian insurance–the laugh track.  But does it work?  Are producers just scared that without prompting we won't know what's funny?  New York Magazine's Joe Adalian tells Bob that a new generation of sitcoms highlights the pros and cons of canned laughter.