for a limited time, join t-mobile and get the awesome iphone xr on us. tonight we know which 20 democratic presidential candidates will be on stage when cnn hosts two nights of debates on july 30th and 31st. i'll be moderating along with my colleagues dana bash and jake tapper. ten candidates will be on stage each debate night. i want to bring in chris cillizza to talk about which candidates will be participating. chris, it's a lot. so tell us who the 20 democratic candidates are that qualified for cnn democratic primary debates. >> okay, don. let's run through it. here we go in alphabetical order. michael bennet, colorado senator. joe biden, former vice president. cory booker, the senator from virginia. steve bullock, new to this debate. the governor of montana. south bend, indiana, mayor pete buttigieg. julian castro, the former mayor of san antonio.