GARDNER: "So, somebody who denies the Holocaust happened is not misinformation?" DORSEY: "It's -- it's misleading information but we don't have a policy against that type of misleading information. We have --" GARDNER: "Millions of people died and that's not a violation of Twitter -- it's -- again, I just don't understand how you can label the president of the United States, have you ever taken a tweet down from the ayatollah?" DORSEY: "I -- I believe we have.”