They can't.
Heard him today and he has caught the hems and ahs and errs from his boss. He really doesn’t answer a lot of questions and the press just lets him slide.
Does anyone even remember what a “follow-up” question is?
“Mrs. obama regrets that her former friend would tell such an untrue story just to sell books”.....see? I could work at the WH too. Just make up lies to cover her blunders....would be a full time job for a staff of 10.