Because they are exposing the peccadilloes / malfeasance etc of potential 2020 Dems. We got Slow-Joe grabbing a SS-agents wifes boob @ an Xmas party and his naked swimming, we got Franken up his eyeballs of grabbing everything and more. We got the Clinton's, Bills Sex-Scandals reborn and all their other more recent behaviors.
She's probably worried dirt will come out on her and she's out for 2020. Which leads to the question who are they really clearing the deck for?....