Rep. Renee Ellmers raised awareness of a new problem with Obamacare’s implementation: the creation of private-sector health insurance monopolies that will limit Americans’ provider choices. The major health insurance company Blue Cross Blue Shield, which is closely coordinating with the White House on Obamacare implementation, will enjoy perhaps the greatest monopoly of all, the North Carolina Republican said in a statement. “Although seven insurance companies currently operate in North Carolina, under the new Obamacare exchanges, those options will dwindle down to one in the majority of counties,” Ellmers said Thursday following the disclosure of figures by federal health officials showing...