The Michigan primary to select the Democratic Party’s nominee for US Senate is pitting progressives against centrists. Donie O’Sullivan talks to activist and streamer Hasan Piker and Democratic Party veteran James Carville, both of whom have very different visions for what kind of candidates will bring Democrats success in the November’s midterms. Watch more on CNN’s The Whole Story with Anderson Cooper: The Left Insurgency, Sunday, August 2, at 8pm ET.