She's already given up her shit to Huber over the last year. wtf you think they've been doin?
The only thing that could come of a congressional hearing is perjurying herself (even accidentally) or embarrassing herself.
No good lawyer is going to let her do that without immunity.
Strzok is probably not going to show tomorrow.
Unless its part of his CIA script to stay on message even when everything is going to crap.