She is accountable only to her master? Her office is the creation of Congress, her salary is paid by the Treasury. A certain deference is in order. Even somewhat who is a millionaire many times, over. Something is going on here that concerns her interest
She is accountable to herself.
We all know her culpability in this matter. What purpose would it serve to afford Congress another opportunity to posture, when they will never do anything to deal with the underlying problem or lop off the head of the beast that created this nightmare in the first place?
I'm just saying that I would not respond at all if I were her. If that attracts a "contempt of congress" citation, that would be accurate. I do have contempt of congress.