If Grassley has evidence and witnesses that can completely clear Kavanaugh, and prove that the Dems, especially Feinstein, helped perpetrate a very ugly fraud, it would make perfect sense to get the accuser to lie under oath. That would trigger Dem/media proclamations of their undying support for her story and how all women must be believed without evidence. Then spring the trap, showing them to be either mendacious criminals or fools with terrible judgement. Next, call the confirmation vote on Kavanaugh, and for Feinstein’s resignation or removal from the Senate. Feinstein refuses to release the original letter because she is worried that this is exactly what awaits her.
Prediction: After foot-dragging a few more days, the accuser will either refuse to testify due to the Republican’s well-known unfairness to womyn, or Grassley will call a halt. Grassley’s many attempts to accommodate her will put that all on her, and make her look like a liar. Evidence of K’s innocence will emerge in alternative media, go unreported by “mainstream”, and the whole thing will end with a whimper. I’ve never been right before, but there’s always a first time.
This whole issue is completely removed from the Democrats as a political weapon as long as Christine Buzzy Ford stalls the process indefinitely. In fact, she's doing great damage to the Democrats as we sit here now.
VERY IMPORTANT POINT: If this process drags on and: (1) Ford doesn't show up to testify; (2) the confirmation vote is held up indefinitely until goobers like Flake and Corker can say "we must hear from her" ... Christine Buzzy Ford can't make any media appearances to tell her fake story in a venue that doesn't expose her to perjury charges.