I suspect it will have some substance, enough to misdirect and allow the Gruber's to claim "see, she's innocent again!"
I would be surprised if she allows herself to be backed into the same "what difference does it make corner". It would be my plan to have her unload something to score the headline, and a coup of degrees of magnitude if it works. if she can shut down the questioning, she never has to answer any real questions. I would suspect she has been in council with the democrat members, knows what's in there and has what she thinks is the kill switch in her hand. Otherwise she would merrily ignore the row, it is early and they are still barking dogs in the wilderness as far as the left is concerned.
She doesn't have to shut it down; it is the Clinton way to misdirect. Take the commission of a felony, lying under oath and make it about a measly blow job. She will try something similar here.
But if I know that, Gowdy knows that, so it will be entertaining.
If this fraud wins the presidency I will give up on Americans.