Vice President Kamala Harris will appear with TV icon Oprah Winfrey at a campaign event in a Detroit, Michigan, suburb Thursday at 8 p.m. ET. Harris and Winfrey will headline a virtual event called Unite for America in collaboration with the Win With Black Women organization.

The evening campaign events follow an explosive report that Lt. Gov. Mark Robinson of North Carolina, the Republican nominee for governor, once called himself a “black NAZI!” and defended slavery on a pornographic forum.