Jan Hatzius, Goldman Sachs Chief Economist, explains why the firm halved its forecast for U.S. growth in the fourth quarter. Amy Wu Silverman, RBC Capital Markets Head of Derivatives Strategy, discusses fears that a delayed U.S. election result could upend markets. Jim Paulsen, The Leuthold Group Chief Investment Strategist, says this correction could have further to go. Julie Norman, University College London Political Science Professor, sees Republicans and Democrats moving towards more convergence on fiscal support.