because the u.s. president has less credibility. >> and there's no person's credibility that matters more than the president of the united states. it is the person in whom billions of people around the world through their governments have placed their futures, their faith, their security, their confidence. >> up next, the impact of trump's lies on the human mind. >> as dishonesty gradually increases, the reaction of the public actually decreases. did you get a whole thanksgiving? well you remember what happened last year. you can't bring a backup thanksgiving to my sister's house. it's not like we're going to walk in with it. we'll bring it in as we need it. ...phase it in. phase it in? yeah, phase it in. phase it in? for adults with moderately to severely active crohn's disease, stelara® works differently. studies showed relief and remission, with dosing every 8 weeks. stelara® may lower your ability to fight infections and may increase your risk of infections and cancer.