Democrats vying for the 2020 nomination spent the first 45 minutes of the second debate hashing out policy disagreements on Medicare for All versus a public option, with progressives arguing that a single-payer system would provide the most benefit to the most people and more moderate candidates saying it would eliminate choice and raise taxes on the middle class. Sen. Bernie Sanders (VT), the author of the Senate’s Medicare for All bill, told the audience in Detroit on Wednesday night...