I guess, then, there is no hope that it could be federally prosecuted.
The concern I have about doing nothing is that it sends the message that the truth isn't important before a committee such as this. If there is literally no response because it is too hard or it is too cumbersome and because that happened yesterday, then the forward-looking message we send to future witnesses is that the truth is optional before this and therefore other committees.
I am not sure which option is the best for us, as a committee, to pursue. Maybe having studied these matters you could share your insights as to whether you agree that a consequence-free response from this committee might signal to future witnesses that the truth is not a requisite when they're in the witness chair.