Kamala Harris is now predicted to win the US election after the odds took a dramatic turn during the televised debate last night, according to online betting exchange Betfair. Harris is currently the odds-on favorite at 20/21, having started the debate at 11/10, odds on Betfair Exchange show. It was a night to forget for Donald Trump, as his odds drifted out to 11/10, their biggest in the last four weeks.