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

itoggle caption Don Ryan/AP

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

itoggle caption Pablo Martinez Monsivais/AP

In New Jersey in March, Dianna Lopez of the Center for Family Services (right) speaks with Betsy Cruz, of Camden, N.J., about health insurance coverage during an Affordable Care Act information session. Lori M. Nichols/South Jersey Times/Landov hide caption

itoggle caption Lori M. Nichols/South Jersey Times/Landov

Under Kevin Counihan, Connecticut's health insurance exchange used concerts and storefront offices to reach customers. Courtesy of Chion Wolf/WNPR hide caption

itoggle caption Courtesy of Chion Wolf/WNPR

Abortion coverage was a key sticking point during the congressional debate on the new health law. Lawmakers eventually agreed to let states decide. Mark Wilson/Getty Images hide caption

itoggle caption Mark Wilson/Getty Images

Vice President Biden (from left), Health and Human Services Secretary Kathleen Sebelius, President Obama and Budget Director Sylvia Mathews Burwell at the White House Friday. Sebelius is stepping down. Burwell is being nominated to replace her. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

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

itoggle caption Evan Vucci/AP

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

itoggle caption Joe Raedle/Getty Images

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

itoggle caption Joe Raedle/Getty Images

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

itoggle caption Carolyn Kaster/AP

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

itoggle caption Tim Matsui/Getty Images