attorney general merrick garland wouldn't say today what he is going to do, saying only the doj, quote, will apply the facts and the law and make a decision consistent with the principles of prosecution. david? >> jon karl following this all day long for us. jon, thank you. >>> and overseas tonight and we're following a developing headline at this hour involving queen elizabeth. we have learned that she spent the night in the hospital. she's now back home at windsor castle, but of course, a trip to the hospital always gets attentio so, let's bring in our foreign correspondent james longman live in london tonight. and james, what do we know about the queen's visit to the hospital? the queen is back at windsor l,- castle tonight. we don't know exactly why she went into the hospital. buckingham palace is always very tight-lipped about her majesty's health. but we do know it was a very short stay. she went in yesterday, she came out at lunchtime today. she was last seen hosting a reception on tuesday night at windsor castle after which she was told by her doctors that she could get some re