Insurer warnings cast doubt on ACA exchange future
Political uncertainty isn't the only threat to the Affordable Care Act's future. Cracks also are spreading through a major pillar supporting the law
Health insurance exchanges created to help millions of people find coverage are turning into money-losing ventures for many insurers.
The nation's largest, UnitedHealth Group Inc., could lose as much as $475 million on its exchange business this year and may not participate in 2017. Another major insurer, Aetna, has questioned the viabil...