The left-leaning Center for American Progress stepped into the debate over the future of health care by proposing a universal health insurance program modeled on Medicare that seeks to preserve employer-sponsored health care while allowing individuals to opt into the government-run insurance model. An employer source dismissed the proposal as a bad deal, but advocates suggest that while the idea is unlikely to gain immediate traction it provides a direction for Democrats ahead of the 2018 mid-terms. CAP’s proposal is...