Christina Hung (left), 23, of Oakland, fills out an application form during a health care enrollment event at the Oakland Asian Cultural Center in Oakland, Calif., on March 31, 2014. State-run health insurance markets that offer taxpayer-subsidized coverage under President Barack Obama’s law are grappling with high costs and disappointing enrollment, challenges that could lead more of them to turn over functions to the federal government, or join forces with other states. (Associated Press) **FILE**