Why not? It can't be less effective than the F.B.I.'s "investigation." You can ask Director Haspel to do it for you; then you can stomp on the tape of it together.

That's a quote from this article:

https://thehill.com/homenews/senate/409907-graham-why-dont-we-dunk-kavanaugh-in-water-see-if-he-floats

This is another quote from that article:

I don't like Senator Hirono much from what I heard her say during the hearing.  I didn't think she was all that articulate.  

That doesn't change Judge Kavanaugh's evasiveness or his supporters' tolerance and defense of his evasiveness, and it doesn't change that the F.B.I. HAS REFUSED TO TALK TO PEOPLE WHO SAY THAT THEY HAVE RELEVANT INFORMATION.