Kamala Harris launches presidential campaign in Wisconsin

United States Vice President Kamala Harris has sought to engage marginalised voters, including a more ethnically diverse voting base, in her first campaign rally in the battleground state of Wisconsin. As the first woman, and the first Black and Asian-American, to serve as vice-president, her supporters will be hoping she can make history again in her bid for US President. But there are still a number of hurdles in her way, including potential legal challenges, as she moves towards a nomination vote early next month.