. >> that will likely be a topic for attorney general merrick garland when he testifies next week. meanwhile, the white house focused on trying to head off an economic crisis caused by supply chain disruptions. empty shelves and increased prices are a reality for so many americans. meanwhile, we may soon know more about boosters for people who received the moderna and johnson & johnson vaccines. an fda advisory committee will meet tomorrow on whether to recommend additional shots. one new study is getting attention, and deservedly so. showing j&j vaccine recipients may fare better with a second shot from a different brand. we have a doctor, a leading expert standing by to take our questions on this in a few minutes' time. but first, let's bring in our starting line on this wednesday night. yamiche alcindor, claire mccaskill, and robert costa. his latest book, "peril," is currently at the top of "the new york times" best-seller list. claire, to channel your prior experience as a prosecutor and member of congress, tell us the scope of what this committee is likely looking for from a

we don't know how quickly the merrick garland justice department will be able to move on this, and in, you know -- in the past these kinds of things have been able to be handled very, very quickly. what is your expectation of a timetable at the justice department for this? >> i would expect they could move pretty quickly. look, the justice department has a rule that they will not prosecute someone for contempt of congress if they are refusing to testify because there has been a legitimate claim of executive privilege by the president of the united states. it ought to be pretty easy for the attorney general to pick up the phone, call the white house counsel and say, dana, did president biden invoke executive privilege for jeff clark or steve bannon or any of these other within witnesses and when the answer is no, as we know the answer is, it's a pretty straightforward prosecution. i think the justice department could do more, by just making it clear that if you are not the subject of an executive privilege assertion by the sitting president of the united states, not donald trump but jo