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POLLS
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                 War. A Senate resolution  condemning Ritchie for libeling the Senate failed, 27-
                 21.  Polk  called  the resolution  a  "foul  deed,"  but he was  motivated  by politics,
                 not concern  for  freedom  of expression. He condemned  other newspapers  for not
                 supporting  his  policies  and  said  a  protracted  war  would  be  the  fault  of  Whig
                 editors  and  their  "treasonable course."
                 SOURCES:  Charles  A.  McCoy, Polk and the Presidency,  1960;  James  K.  Polk, The
                 Diary of James K.  Polk,  1910.
                                                                     Charles  Caudill

                 POLLS   are used  to measure political  attitudes, beliefs,  and  actions  of  a sample
                 representing  some  percentage  or  aspect  of  the population.  Samples  of  the pop-
                 ulation  are interviewed.  Historically,  straw polls were conducted by  newspapers
                 and magazines to measure, unscientifically,  voting preferences  among the public.
                 However,  in  the  1930s,  three  men  from  the  advertising  profession  found  ways
                 to  apply  scientific  techniques  to  polling  for  better  measurement  of  attitudes.
                 Those men were George Gallup, Elmo Roper,  and Archibald Crossley. Through
                 demographics,  the  pollsters  could  reach  broader  ranges  of  varied  groups  and
                 thereby  project  more  accurately.
                   Polling  became  an  important  part  of  the  political  communication  process
                 when  in  1936  a  poll  conducted  by  the  magazine  Literary  Digest  incorrectly
                 predicted  that  Franklin  Delano  Roosevelt  would  be  defeated  by  Alfred  Landon
                 for the presidency. The new, scientific polling techniques from Gallup and others
                 predicted  that  Roosevelt  would  win. The Literary  Digest's  error paved  the way
                 for  the  acceptance  of  scientific  polling  techniques  to  be  used  by  the  press  to
                 accurately  measure  public  opinion.  Polling  used  to  be  done  by  personal  inter-
                 view,  but  today  nearly  all polls  are  done  by  telephone.
                   More important than the use of polls to predict who will win an election is their
                 use to develop campaign  strategy. Candidates rarely offer  untested ideas or poli-
                 cies. Instead, they tell the voters what polls indicate the voters would like to hear.
                 SOURCE: Erik Barnouw, ed., International Encyclopedia of Communication,  1989.
                                         Jacqueline  Nash  Gifford and  Guido H  Stempel  III


                 POLLS   AND   POLLSTERS.   See  Gallup  Poll;  Literary  Digest  Poll;  Elmo
                 Roper.

                  PRESIDENTIAL   MEDIA   MANIPULATION.    The  president  has  a  clear  in-
                  terest  in  media  content.  The  media  define  presidential  success  or failure,  and  it
                  is  therefore  in  the president's  political  interest  to ensure that  media coverage is
                  as favorable  as possible. Appropriate coverage can help sway the public  agenda,
                  give impetus to the presidential agenda, and create a favorable climate of opinion
                  toward the incumbent. To this end recent presidents have used three interrelated
                  strategies  to  influence  and  manipulate  media coverage—news conferences,  per-
                  sonal  relations  with  journalists,  and  the  White  House  Office  of  Communica-
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