It appears that the Obama campaign may have put together so-called truth squads consisting of prosecutors and at least one sheriff to hold accountable those who speak ill of their candidate. The term "hold accountable" is undefined.
The first link is to a press report of the situation.
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The second link is a statement by the Missouri Governor's office.
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The report is disturbing on its face. In my opinion, it raises a question about how the candidate would act if invested with the powers available to the President.