Democrats open their convention transformed by Harris' ascendance but facing lingering questions

A refreshed Democratic Party reintroduces itself to a divided nation this week with a convention that opens Monday. The party has been transformed by the money, momentum, relief and even joy that followed Vice President Kamala Harris’ rise to the top of its ticket. Above all, the four-day gathering in Chicago is designed to celebrate and strengthen Harris as President Joe Biden’s replacement. Biden will give the keynote address Monday night. Just beneath the surface, real questions loom about the depth of Harris’ newfound support and the strength of her movement. She and Minnesota Gov. Tim Walz, her running mate, must introduce themselves to Americans after not running a primary campaign.