situation that keeps getting worse for boeing and for the airlines that fly the max. >> reporter: boeing tells nbc news the safe return to service of the 737 max is our company's top priority. >> the advice from the travel pros start looking for air fares for the winter holidays and if you see a good price, grab it. one day after robert mueller testified before congress, democrats tonight are still debating whether to pursue impeachment of the president. white house correspondent kristen welker is here. kristen, this is a big split among democrats and it didn't change because of yesterday. >> it certainly is lester. good evening. democrats are still very divided about how to move forward. capitol hill sources tell nbc news there's broad agreement the mueller hearings did not deliver the kind of punch they were hoping for to start impeachment proceedings and it actually may have blunted momentum. but there are still