[Mike Darancette]

Duane, what puzzles me is why Petraeus’ resignation disqualifies him from testifying at all. I’m not the only one puzzled, either. NRO’s Katrina Trinko can’t figure it out:

Not disqualified, rather the Director of the CIA was called to testify which Petraeus is no longer. But he can he called by name.

[Alberta's Child]

Thanks for the clarification on that. It explains why he is no longer even compelled to testify in the capacity in which he was originally called.