Actually after reading the rest of the statement I realize what their real fear is, Trump is someone that will not back down. He will bring up all of the Clinton scandals.
The media will not be able to shut him up nor bring out for discussion the many reported misdeeds of the Clintons and allow the American voters hear the evidence and make an informed judgement.
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The same can be said for Cruz or Rubio.
I understand that a Hillary movie has been prepared for the Cruz campaign.