The Republican Party is facing resistance from both the left and the right as it tries to undo key provisions of the Obama administration’s Affordable Care Act (ACA) of 2010. Even if the current GOP bill, called the American Health Care Act (AHCA), bites the dust, some changes will surely have to be made, so the only question is which ones and why. President Trump’s demands for the bill are unhelpful: “Affordable coverage for everyone; lower deductibles and health care costs; better care; and zero cuts to Medicaid.” No responsible reforms can meet these populist expectations.