This is simply a case of wanting to be able to spin the PR to your advantage when emerging on the courthouse steps. If the testimony were to be made public she couldn’t do that.
Lerner: “I destroyed many conservative organizations and caused untold suffering, but I do not want to be held responsible. I was just doing my job. If the people I injured find out what I did they might get angry with me.”
Her problems are just beginning, what with Congress voting to refer her to the DOJ for criminal prosecution.