these are the numbers that define race in our country. >> yang pivoted to the main focus of his platform, the universal basic income. he wants to give each american 18 and old, a freedom dividend of $1,000 a month. he says he guarantees that if it existed, he would not have been the only candidate of color on the stage. elizabeth warren drew wild applause when she fired back about a question about her age, when she would be the oldest president ever inaugurated if she wins in 2020. she didn't miss a beat. >> you would be the oldest president ever inaugurated. >> i would also be the youngest woman ever inaugurated. >> boom. warren would be 71 at the time of her inauguration if elected. tallying up who had the most speaking time, bernie sanders led the pack at 20 minutes. klobuchar, warren and buttigieg with 19 minutes of air time.