text:  This is Week in Edition from NPR News. I'm Ayesha Roscoe. While President Joe Biden insists he's staying in the race, there are still calls for him to step down from some within his own party who think another Democrat would have a better chance of beating Donald Trump. This has put Vice President Kamala Harris in the spotlight. Yesterday, she was on stage at the Essence Festival in New Orleans, which celebrates black culture.