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>> reporter: thats what we wonldered about you, sasha. >> she hates chicago? >> no. >> reporter: she wouldnt go? >> no. >> reporter: she had to study? [ bell ] the white house says sasha couldnt come to chicago because she had an exam the next morning at her private school in washington. a once in a lifetime farewell speech by dad versus a science exam? >> i think its important that theyre showing that the education is the most valuable thing. >> reporter: but whether or not sasha aces the exam ...