Because this is an obvious ploy by the Democrats to use the FBI investigation to delay his appointment until the midterms are over and the Democrats can block a Republican Supreme Judge. This is pretty much confirmed when all the Democrats did during the questioning is ask him about requesting an FBI investigation. At the end of the day, there is not a single shred of evidence to support any of this, besides her word. It seems that these days, as long as you're a woman, you can claim that someone raped you back 50 years ago and that'll take you for granted.