If you didn’t do anything wrong then why not testify?
What if you were assured by your bosses that what you were doing was completely legal? That there would be no repercussions?
Then.... all of a sudden they point their fingers at you, and you know what will happen.
From what I can tell, Lerner wants immunity from prosecution before she gives further testimony, and that is what happened yesterday between her and Issa. He even mentioned immunity in his response to her.