Insurers and health care experts are increasingly skeptical that long-awaited measures to stabilize the Affordable Care Act exchanges will ride in the upcoming March 23 omnibus due to the partisan feud over Hyde-amendment language, and are bracing for marketplace chaos should Congress not secure funding for reinsurance or cost-sharing reduction subsidies. Over the past week, Republican efforts to link abortion restrictions to insurance plans created a roadblock in market stabilization talks. Although Hyde-amendment protections to prevent federal funds from going...