CNN Erin Burnett OutFront September 9, 2019 23:59:00
Is an asian man who likes math. >> reporter: supporters wear hats who say, math, make america think harder. but some didnt think much of yangs crowd surfing calling it yangs howard dean moment. >> and north dakota and new mexico! >> reporter: the overenthusiastic dean scream was often blamed for bringing his presidential campaign to a screeching halt. >> and then were going to washington, d.c. to take back the white house! yeah! >> reporter: will andrew yank some day regret his crowd surfing? ac...
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