Should be a standard follow-up:
“Is that because of National Security or other confidential information reasons?”
Yes of course, some kind of clarification to elucidate the obfuscation.
I think Cruz did a great job. He will be drawn and quartered in the MSM with mere references to conspiracy theories without drawing attention to the issue he was addressing. And she's just a new kid on the block, with, natch, an agenda. Here's her statement from way back in March. https://www.rules.senate.gov/imo/media/doc/Testimony_Sanborn1.pdf