The head of DC’s health exchange threw cold water on Democratic Sen. Claire McCaskill’s (MO) idea of opening up the DC marketplace to any person living in a county with no other health care options, saying in a statement that the proposal could turn the DC exchange into the nation’s high risk pool at the expense of District residents. Meanwhile, the nation’s insurance commissioners Thursday urged congressional leaders to quickly shore up the nation’s marketplaces by funding the ACA’s cost-sharing...