Winfrey introduced celebrities and shepherded an audience that was both live and on Zoom between energetic applause and somber reflection.

Vice President Kamala Harris sought to capitalize on the star power of Oprah Winfrey and a host of Hollywood celebrities to help her win over persuadable voters during an online rally Thursday night that ranged from participants’ searing accounts of personal loss and trauma to the Democrat’s unguarded remark about her own gun ownership.