By Gabriella Borter and Stephanie Kelly FARMINGTON HILLS, Michigan (Reuters) -A star-studded virtual event hosted by Oprah Winfrey Thursday night to build enthusiasm for Kamala Harris' campaign was marked by teary moments and celebrity endorsements,

The two are meeting in a suburb of Detroit at a virtual event called “Unite for America,” which will featured members of some of the online groups that have coalesced around Ms. Harris.

U.S. Democratic presidential candidate Kamala Harris and billionaire Oprah Winfrey will host an online event, 'Unite for America,' to rally voter support in battleground states. The event, featuring various grassroots groups,