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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Andrew Harrer/Bloomberg via Getty Images

Peter Lee, executive director of Covered California, the state's health insurance exchange, said the projected rate increases for 2017 are linked to increases in the cost of health care in the state. Rich Pedroncelli/AP hide caption

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Rich Pedroncelli/AP

A guide works on the federal enrollment website as she helps a Delaware resident sign up for coverage under the Affordable Care Act in 2014. Andrew Harrer/Bloomberg via Getty Images hide caption

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Andrew Harrer/Bloomberg via Getty Images

President Obama speaks in Dallas in 2013 about the technical problems that affected the initial rollout of the Affordable Care Act. Now, citing the law's success, he is urging Congress to expand the insurance offerings. Brendan Smialowski/AFP/Getty Images hide caption

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Brendan Smialowski/AFP/Getty Images

Her income as a New Orleans singer fluctuates with the tourist season, says Lisa Lynn Kotnik, and that's made health insurance too expensive in the past. Now that she has a Medicaid card, getting the health care and medicine she needs should be easier. Courtesy of Skip Bolen hide caption

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Courtesy of Skip Bolen

Louisiana Medicaid Expansion Brings Insurance To Many New Orleans Musicians

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How do you stay on the family health plan without your parents finding out about your health issues? Alex Williamson/Ikon Images/Getty Images hide caption

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Alex Williamson/Ikon Images/Getty Images

A subsidiary of CareFirst BlueCross BlueShield in Virginia won't offer an insurance plan on the lowest tier of the marketplace next year. Morgan McCloy/NPR hide caption

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Morgan McCloy/NPR

UnitedHealth Group, based in Minnetonka, Minn., says it expects to lose $650 million on health exchange plans this year. Many people who bought the plans are in relatively poor health, the company says. Mike Bradley/Bloomberg via Getty Images hide caption

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Mike Bradley/Bloomberg via Getty Images

Ohio residents feel split about Obamacare Ken Orvidas for NPR hide caption

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Ken Orvidas for NPR

Split Views On Health Overhaul In Ohio

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Katherine Streeter for NPR

Hospitals Adapt ERs To Meet Patient Demand For Routine Care

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Blue skies in San Juan, Puerto Rico belie the U.S. territory's struggle with massive debt. The islands have a generous health care program that covers nearly everyone, but economists say it has never been adequately funded. Christopher Gregory/Bloomberg via Getty Images hide caption

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Christopher Gregory/Bloomberg via Getty Images

Puerto Rico's Growing Financial Crisis Threatens Health Care, Too

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Republican presidential candidate Donald Trump has unveiled a health care plan that starts with repealing Obamacare. Maddie McGarvey for The Washington Post/Getty Images hide caption

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Maddie McGarvey for The Washington Post/Getty Images
Lorenzo Gritti for NPR

In Texas, Uneven Expansion Of Obamacare Sows Frustration

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Democratic presidential candidate Hillary Clinton speaks at a Las Vegas high school last Friday. Justin Sullivan/Getty Images hide caption

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Justin Sullivan/Getty Images

Hillary Clinton Hitches Her Health Care Wagon To Obamacare

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