John Martin, 24, was uninsured until a health care navigator told him he could get coverage through his parents' health plan. Jenny Gold hide caption

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Henry Ford Hospital treats Detroit residents. About 1 in 3 residents of that city is uninsured, and the hospital CEO hopes Medicaid expansion will increase the number of people with health insurance. Eric Whitney hide caption

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Maria Webster joins others protesting Texas Gov. Rick Perry's stance against the Affordable Care Act in early 2013. Eric Gay/AP hide caption

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Does having health insurance make it less likely that people will come to the ER? No, says a study in Oregon. iStockphoto hide caption

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Dr. Tim Ihrig, a palliative care physician, treats Augie Avelleyra, 93, at his home in Fort Dodge, Iowa. Courtesy of Paula Avelleyra hide caption

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Enroll America outreach workers talk to congregants at the Mt. Calvary Church in Jacksonville, Fla. Eric Whitney hide caption

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Low-income adults formerly had few options for free health care. Leah Sessor had her blood pressure taken on April 14, 2012, during a free clinic at a racetrack in Bristol, Tenn. Mario Tama/Getty Images hide caption

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Wisconsin Gov. Scott Walker speaks at the Conservative Political Action Conference in March. Pete Marovich/Getty Images hide caption

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Kyle Thompson and his family are all going to have health coverage in Oregon, thanks to the state's successful effort to enroll people in Medicaid. Kristian Foden-Vencil hide caption

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Click right this way for Medicaid. Connect for Health hide caption

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Bill Clinton says President Obama should figure out a way to honor his promise that people who like their insurance can keep it. OZY via Facebook hide caption

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Footprints mark the spot where immigrants stand while taking eye tests at the Salud Family Health Clinic in Ft. Collins, Colo. The nonprofit provides health care to immigrants seeking asylum and migrant farm workers. John Moore/Getty Images hide caption

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