Rep. Debbie Dingell: Democrats need to define 'who' Harris is and 'who we are'

On day three of the Democratic National Convention in Chicago, Rep. Debbie Dingell (D-Mich.) joins Meet the Press NOW to discuss how Democrats can better explain Vice President Kamala Harris' stances on policy issues, and her concerns over former President Donald Trump's refusal to accept the outcome of the presidential election.