The protests over federal enforcement operations in Minneapolis are “absolutely not sustainable” according to Minneapolis Police Chief Brian O’Hara. “Our cops are tired. They are thin-stretched as it is, and we have a job to do trying to keep people of this city safe,” O’Hara said Sunday on "Face the Nation." He said the Minnesota National Guard and other local, state and county law enforcement partners were called in to respond to Saturday’s protest following the shooting of 37-year-old Alex Pr