knows that ben carson's greatest medical achievement was successfully separating two conjoined newborn twinsat one of those twins was ben carson himself. tonight, 64 years later, we reunit the twins in a "the daily show" exclusive debate. ♪ >> good evening! welcome to the first ever carson twins reyiewn one debate! our speakers tonight, former presidential candidate dr. ben carson. and his estranged identical twin brother dr. ken carson! (cheers and applause) >> thank you, desi. pleased-to-be -- >> okay! let's just get right into it! my first question, you both publicly endorsed donald trump for president. what do you think would be the most positive aspect of a donald trump presidency? ben carson, you go first. >> i think the most positive aspect will be having somebody who's not controlled by special interests and big money. >> excuse me. i would prefer a chance to answer this question. >> okay, go ahead. dr. carson... >> sorry. i was blinking. (laughter) what were we talking about? >> donald trump. you've said that even if he's a bad president, we'll only have him for four years. >> oh, y