Alina Nurieva (right) sat with Gabriela Cisneros, an insurance agent from Sunshine Life and Health Advisors, and picked an insurance plan at the Mall of the Americas in Miami last November. Joe Raedle/Getty Images hide caption

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Mark Bertolini, CEO of Aetna, told the Justice Department in July that the insurer would walk away from many health exchanges if the government opposed the company's proposed deal for Humana. On Tuesday, Aetna followed through. Andrew Harrer/Bloomberg via Getty Images hide caption

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Aetna is the latest big health insurer to retreat from the exchanges established under the Affordable Care Act. Jessica Hill/AP hide caption

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Aetna Joins Other Major Insurers In Pulling Back From Obamacare

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At Blue Cross and Blue Shield headquarters in Eagan, Minn., the losses on the sale of insurance plans to individuals led to a change in course. Jim Mone/AP hide caption

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When deductibles and copays are high, quite a few people with insurance turn to free clinics for care. Jens Magnusson/Ikon Images/Getty Images hide caption

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People with diabetes who sign up for an Aetna insurance plan focused on diabetes care can get blood sugar meters and test strips free of charge. iStockphoto hide caption

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Secretary of Health and Human Services Sylvia Burwell talks before a Capitol Hill hearing Wednesday with Rep. Paul Ryan, R-Wis., as Rep. Pat Meehan, R-Pa., looks on. Getty Images hide caption

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People protesting against the Affordable Care Act rallied outside the Supreme Court in March, before arguments in the second major challenge to the law. Jim Lo Scalzo/EPA/Landov hide caption

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Opponents of the Affordable Care Act protest outside the Supreme Court Wednesday before oral arguments in the second major challenge to be heard by the justices. Jim Lo Scalzo/EPA/Landov hide caption

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Speaker of the House John Boehner, R-Ohio, leaves the chamber Feb. 3 after another House vote to repeal the Patient Protection and Affordable Care Act. J. Scott Applewhite/AP hide caption

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