to stand by what we say and be consistent with what we say, i'm worried it's going to lead to a lot of tests for the united states. >> more tests, haass believes, 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. tremfya® helps adults with moderate to severe