Errin Haines on how Kamala Harris has changed voter perception of Joe Biden

01:55

Errin Haines, editor-at-large of The 19th, says the debate clash last summer between Joe Biden and Sen. Kamala Harris over segregated bussing helped make today’s Democratic ticket stronger. She tells Ali Velshi while Biden has always had strong support among Black voters, the exchange helped him “grow on the topic of race.”