dem·a·gogue /ˈdɛməˌgɑg/
  煽動者,群眾煽動者
  Dem·a·gogue n.  A leader of the rabble; one who attempts to control the multitude by specious or deceitful arts; an unprincipled and factious mob orator or political leader.
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  demagogue
       n : an orator who appeals to the passions and prejudices of his
           audience [syn: demagog, rabble-rouser]