text:  It's Morning Edition from NPR News. I'm Steve Inskeep. And I'm Leila Faudel. Since a pretty dismal debate performance by President Biden, the Democratic Party seems really divided between those who are backing the president as the nominee and those asking him to step aside. In a letter published last week by the Leadership Now Project, a group of business leaders and Democratic Party donors, the group urged the party to, quote, pass the torch of this year's presidential nomination to the next generation.