Major insurers participating in Obamacare have won approval for substantial premium hikes next year in a dozen or more states. The increases range as high as 30 percent to 50 percent, according to new data.

Shaken by the decisions of Aetna, UnitedHealthcare, Blue Cross Blue Shield and other giants to pull out of many states after incurring hundreds of millions in losses, state insurance regulators appear more than willing to go along with these rate increases to prop up insurers remaining in the program.

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