Sen. Mary Landrieu, D-La., speaks at an Oct. 2013 news conference on Capitol Hill in Washington. Landrieu's support for the Affordable Care Act is center stage in her campaign for a fourth Senate term. Evan Vucci/AP hide caption

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Yudelmy Cataneda, Javier Suarez and Claudia Suarez talk with insurance agent Yosmay Valdivian at a session to sign up for health insurance in a Miami mall March 20. Joe Raedle/Getty Images hide caption

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Janelle Arevalo, an insurance agent with Sunshine Life and Health Advisors, makes a house call in Miami to sign up Sandra Berrios (left) for an insurance plan under the Affordable Care Act. Joe Raedle/Getty Images hide caption

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Linda Door protested outside the U.S. Supreme Court as it began hearing arguments on the constitutionality of the Affordable Care Act in March 2012. Carolyn Kaster/AP hide caption

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At the center of the debate: prescription contraceptives. Tim Matsui/Getty Images hide caption

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President Obama: He's been called out on one of his highest-profile promises. Drew Angerer/pool/Getty Images hide caption

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Doug Normington is 58, self-employed, and has diabetes. Courtesy of Doug Normington hide caption

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Sen. Mary Landrieu, D-La., is facing a tough re-election bid. J. Scott Applewhite/AP hide caption

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