More than 80 percent of the people getting federal subsidies to defray the cost of their monthly health insurance premiums have jobs, statistics suggest. And many are middle class. Jen Grantham/iStockphoto hide caption

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Latoya Watson of Washington, D.C., cheers during a rally outside the Supreme Court on Wednesday, when the justices heard arguments in King v. Burwell. Andrew Harnik/AP hide caption

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Fans and foes of Obamacare jockeyed for position outside the Supreme Court Wednesday. Inside, the justices weighed arguments in the case of King v. Burwell, which challenges a key part of the federal health law. Pete Marovich/UPI/Landov hide caption

itoggle caption Pete Marovich/UPI/Landov

Supporters of the Affordable Care Act gather in front of the U.S Supreme Court during a rally Wednesday. The court heard arguments in the case and is expected to announce its decision in June. Alex Wong/Getty Images 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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There's a second chance coming for some people who didn't buy health insurance and would face a big tax penalty for 2015 otherwise. Laughing Stock/Corbis hide caption

itoggle caption Laughing Stock/Corbis

Speaker of the House John Boehner, R-Ohio, pauses at a news conference before announcing that the House planned to vote Tuesday to repeal the Patient Protection and Affordable Care Act, following a GOP strategy session at Republican National Committee headquarters on Capitol Hill in Washington. While the repeal passed 239-186, it's likely to fail in the Senate or be vetoed by the president. J. Scott Applewhite/AP hide caption

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House Speaker John Boehner answers questions during a press conference at the U.S. Capitol Wednesday. The House is debating changes to the Affordable Care Act's employer mandate. Win McNamee/Getty Images hide caption

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Need a gift for a 20-something kid about to age out of the family's health plan? Juana Rivera (left) discusses insurance options with Fabrizzio Russi, an agent from Sunshine Life and Health Advisors, at the Mall of the Americas in Miami. Joe Raedle/Getty Images hide caption

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Elisa Carrero assists Julian Gauiria, of Paterson, N.J., with enrollment in the health insurance exchange in November. Signups continue to be brisk, health officials say. Tyson Trish/North Jersey/Landov hide caption

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MIT economist Jonathan Gruber testifies Tuesday before the House Oversight Committee. He apologized for his comments on how the Affordable Care Act was created. Molly Riley/AP hide caption

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Andres Cuartas got help from an agent last March when he signed up for health insurance at a Miami mall. In the last year, the percentage of women who are uninsured has dropped more than the percentage of uninsured men. Joe Raedle/Getty Images hide caption

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People wait to enter an Affordable Care Act enrollment event sponsored by SEIU-United Healthcare Workers West and Community Coalition in Los Angeles. Healthcare.gov's second enrollment period opened Saturday. More 100,000 people applied in the first day. Michael Chavez/AP hide caption

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The second open enrollment period for buying health insurance under the federal Affordable Care Act starts Saturday. Don Ryan/AP hide caption

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In this May 12, 2009, photo, Jonathan Gruber, professor of economics at the Massachusetts Institute of Technology, participates in a Capitol Hill hearing on the overhaul of the heath care system in Washington. Pablo Martinez Monsivais/AP hide caption

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