Bloomberg adviser: 'Stop-and-frisk was a mistake, Mike regrets it'

06:23

Bloomberg adviser Tim O'Brien joins Andrea Mitchell to discuss Mike Bloomberg's prospects of uniting the moderate wing of the Democratic Party in the 2020 race, and address the controversy surrounding newly re-surfaced audio from 2015 of Bloomberg defending a stop-and-frisk program that was ruled unconstitutional for unfairly targeting people of color.