Article snippet: ATLANTA — The second set of summer Democratic presidential debates will feature a rematch with a twist, plus the first showdown of leading progressives as the party wrestles with its philosophical identity and looks ahead to a 2020 fight against President Trump. Former Vice President Joe Biden and Senator Kamala Harris of California will take center stage July 31, barely a month after Harris jolted the sprawling field in the first debates and propelled herself to clear top tier status with an aggressive takedown of the 76-year-old Biden’s long record on race. CNN, which is broadcasting the debates, assigned candidates randomly with a drawing Thursday night, with 10 candidates spread evenly over two events scheduled July 30-31 and held in Detroit. This time, Harris, the lone black woman in the field, will be joined by another top black candidate, Senator Cory Booker of New Jersey, who also has been an outspoken critic of Biden. Booker had denounced Biden for his recollections of the ‘‘civility’’ of working in a Senate that included white supremacists and for his leadership on a 1994 crime bill that Booker contends assailed as a mass incarceration agent in the black community. Meanwhile, Senators Elizabeth Warren of Massachusetts and Bernie Sanders of Vermont will headline the July 30 lineup, allowing the two progressive icons to compete directly for the affections of the party’s left flank. They will be joined by several more moderate candidates who are likely to... Link to the full article to read more