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Liberal superPAC expands, keeps ears peeled for GOP gaffes

03:21

Politico Playbook: The superPAC American Bridge films GOP nominees and busts them in "off-message moments," and the group is in the middle of an expansion ahead of the midterm election season. Politico's Mike Allen joins Morning Joe to discuss what the group is up to and why Newark, N.J. Mayor Cory Booker was a no-show at the state's first Senate debate.