Heh! That DU post, if I understand their time-stamps correctly, was posted at the low for today. Since that post the Dow has recovered about 2/3 of that drop. Unless today's drop involved CNN or CNN's corporate parent, the drop probably had nothing to do with yesterday's beat-down of that CNN "reporter".
OTOH, if the drop did involve CNN (and maybe other skews media stocks), it would likely mean that investors think CNN (and maybe other skews media) is going to be hurt by their urination match with Trump.