Winfrey, who has endorsed Harris and spoke at the Democratic convention in August, is set to host a two-hour “Unite for America” nighttime streaming session in Michigan with Harris that organizers say aims to highlight dozens of grassroots groups backing the vice president.

U.S. Vice President Kamala Harris will join celebrity Oprah Winfrey in a livestream event next week to rally support in key battleground states in the Nov. 5 presidential election, Harris' campaign said.