In New Hampshire, where the Affordable Care Act remains unpopular, the state has exceeded expectations for insurance enrollments. Credit goes, in part, to a grass-roots campaign to sign people up. Brian Snyder/Reuters /Landov hide caption

itoggle caption Brian Snyder/Reuters /Landov

When Brad Stevens was young, his only "health insurance" was taking tons of vitamins and spending three hours at the gym every day. But after a serious bike accident and an expensive battle with thyroid cancer, the 59-year-old realized nobody's invincible. Heidi de Marco/Kaiser Health News hide caption

itoggle caption Heidi de Marco/Kaiser Health News

Illinois' health insurance marketplace is working to sign up Hispanics. About 29 percent of Latinos in the U.S. are uninsured. AP hide caption

itoggle caption AP

Maygan Rollins, a field organizer with Enroll America, talked health insurance options with Jerry Correa during a recent campaign in Miami. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP

Christine Moyer checks out options at a health insurance enrollment fair on March 18 in San Francisco. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images