among democrats, president obama is calling on african-americans to turn up the heat. insult, an insult to my legacy if this community lets down its guard and fails to activate itself in this election! you want to give me a good sendoff? go vote! >> reporter: as president obama tries to unify democrats, there are new rifts this morning among republicans. the rnc chairman, reince priebus, this weekend saying that it is time for donald trump's former primary opponents

you killed it! >> back in a moment, this is

and i like that. i'm really good at war. i love war in a certain way. including with nukes, yes including with nukes. i know more about isis than the generals do, believe me.