talk, what do i do? >> in a now-deleted tweet, sanders appeared to mock stutterers. first, sanders tried to suggest that her post was not about stuttering. but she eventually removed the tweet and apologizes after biden tweeted back, that stuttering is something he has worked his entire life to overcome. andrew yang lamented he was the sole minority candidate to qualify for last night's debate. >> it's an honor and a tragedy to be the only person of color on the stage tonight. black and latinos have something much more powerful working against them than words. they have numbers. the average net worth of a black household is only 10% of a white house household. for latinos, it's 12%.