FILE - In this Tuesday, Aug. 19, 2014, file photo, a pedestrian walks past a sign for Aetna Inc., at the company headquarters in Hartford, Conn. While Republicans rewrite the Affordable Care Act in Washington, the immediate future of the law has grown hazier with the nation's third-largest health insurer Aetna saying that it will completely divorce itself from state-based insurance exchanges. (AP Photo/Jessica Hill, File)
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