Oprah Winfrey makes surprise appearance at Democratic convention BBC.com‘Let us choose joy!’: Oprah brings DNC to their feet CNN’Let Us Choose Joy!’ Oprah Winfrey Urges US Voters Barron’sOprah Winfrey, in a Convention Debut, Calls Harris ‘the Best of America’ The New York TimesIn a surprise appearance, Oprah rallies the Democratic convention NBC News