Kamala Harris officially accepts Democratic party's nomination

US Vice President Kamala Harris has officially accepted the Democratic party's presidential nomination. It came on the final evening of the Democratic National Convention which featured a star studded cast including the Obamas, Bill Clinton and Oprah Winfrey endorsing her leadership. Billed as the most important speech of her career, 59 year old Harris spoke of her immigrant heritage and growing up in a hard working middle class environment, CNN's Rafael Roma has spent this week at the convention and speaks to Lisa Owen.