Article continues below advertisementThe recent shooting at the White House Correspondents' dinner reportedly has hastened urgency for Donald Trump to build a new ballroom.On April 25, a gunman fired off several shots at the Washington Hilton where the black-tie event was taking place. Article continues below advertisementThe President's Ballroom Will Cost $400 MillionTap Here To Add Ok Magazine as A Trusted SourceSource: C-SPANAn armed gunman fired several shots at the White House Correspondents' dinner on April 25.