Trump says he isn't 'spending a lot of time' preparing for his debate with Kamala Harris

Ian Maule/Getty Images, ANDREW CABALLERO-REYNOLDS/Getty Images

• Trump says he's not putting in too much time preparing for his debate with Kamala Harris.
• "You have to know your subject," he said. "And I think I know it better than anybody."
• He also said he would rather the debate be held on Fox News instead of ABC News.

Former President Donald Trump said he's not devoting much time to preparing...