Joe is the same Harvard student who shot to fame in South Korea earlier this year for asking the Japanese Prime Minister a question about his controversial stance on Japanese wartime crimes against women (see: http://goo.gl/ETw73c AND https://goo.gl/Z2ZtFM).
Here is his public profile: https://www.facebook.com/joechoe23
At the "No Labels" Conference on October 12, Donald Trump ironically used labels to stereotype Joseph "Joe" Choe (Harvard's Class of 2017). He asked, "Are you from South Korea?" without even letting Joe finish asking the question and rudely cutting him off. (The organizers of the event even took away Joe's microphone so he couldn't speak up.)
Video credit: CSPAN