Just three weeks to go before the US presidential election. The contest between Donald Trump and Kamala Harris is on a knife-edge with a sharp focus on seven key marginal states. So, how will the candidates fight the final stretch of the campaign? In this episode: John Zogby, Author, 'Beyond the Horse Race: How to Read Polls and Why We Should'.  Steven Erlanger, Chief Diplomatic Correspondent in Europe, The New York Times. Paul Musgrave, Associate Professor, Government, Georgetown University Qatar. Host: Tom McRae Connect with us:@AJEPodcasts on Twitter, Instagram, Facebook At Al Jazeera Podcasts, we want to hear from you, our listeners. So, please head to https://www.aljazeera.com/survey and tell us your thoughts about this show and other Al Jazeera podcasts. It only takes a few minutes!