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

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