Oprah Winfrey backs Kamala Harris during surprise Democratic convention speech

Oprah Winfrey endorsed Kamala Harris and Tim Walz during an energetic speech (AP Photo/Erin Hooley)

Oprah Winfrey has given an energetic speech in support of Kamala Harris during the Democratic National Convention.

The media mogul made a surprise appearance on the third night of the convention in Chicago – where her famous TV talk show was filmed for many years.