President Trump asserted on Saturday that special counsel Robert Mueller's investigation into possible collusion between the Trump campaign and Russia should never have been opened in the first place. "The Mueller probe should never have been started in that there was no collusion and there was no crime," Trump wrote on Twitter. "It was based on fraudulent activities and a Fake Dossier paid for by Crooked Hillary and the DNC, and improperly used in FISA COURT for surveillance of my campaign. WITCH HUNT!" The Mueller probe should never have been started in that there was no collusion and there was...