Democratic presidential candidate Hillary Clinton has ideas about how to rein in health costs that hit consumers in the pocketbook. But would they work? Darren McCollester/Getty Images hide caption

itoggle caption Darren McCollester/Getty Images

Jane Garcia, CEO of La Clinica de la Raza, which serves 25,000 patients in Contra Costa County, Calif., addresses supporters of expanding health care for undocumented adults. Farida Jhabvala Romero/KQED hide caption

itoggle caption Farida Jhabvala Romero/KQED

Note: Bars represent the average family premium for employer-based insurance. They are the total paid and reflect contributions by employers and workers. Source: Kaiser Family Foundation survey hide caption

itoggle caption Source: Kaiser Family Foundation survey

Marilyn Kruse couldn't get health insurance through her job as a substitute teacher in Jefferson County, Colo. Now she buys insurance through the state's health exchange. John Daley/Colorado Public Radio hide caption

itoggle caption John Daley/Colorado Public Radio

A Medicaid office employee works on reports at Montefiore Medical Center in New York in late 2014. New York expanded Medicaid eligibility under the Affordable Care Act and enrollment surged. Julie Jacobson/AP hide caption

itoggle caption Julie Jacobson/AP

Cris and Valerie Fiore hold one of their favorite pictures of their sons Anthony (with the dark hair) and Nick. Anthony died from a heroin overdose in May 2014 at the age of 24. Cris Fiore's eulogy described his son's death as a shock, but "not a surprise." Anthony had been addicted to heroin for years. Ben Allen/WITF hide caption

itoggle caption Ben Allen/WITF

A Texas lawsuit filed against 30 insurance plans in 15 states alleges that the companies overcharged Medicare for doctors' house calls. Laughing Stock/Corbis hide caption

itoggle caption Laughing Stock/Corbis

Brenda Hummel and her 7-year-old daughter Andrea in their home near Des Moines, Iowa. Andrea was born with severe epilepsy and gets her health care through Medicaid. Clay Masters/Iowa Public Radio hide caption

itoggle caption Clay Masters/Iowa Public Radio

Enrollment counselor Vue Yang (left) reviews health insurance options for Laura San Nicolas (center), accompanied by her daughter, Geena, 17, at Sacramento Covered in Sacramento, Calif., in February. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

A Yale University study analyzed the experience of 60 million Americans covered by traditional Medicare between 1999 and 2013, and found "jaw-dropping improvements in almost every area," the lead author says. Ann Cutting/Getty Images hide caption

itoggle caption Ann Cutting/Getty Images

At sign-up events like this one in Los Angeles in 2013, Covered California pledged "affordability" in health insurance as one of its main selling points. Lucy Nicholson/Reuters/Landov hide caption

itoggle caption Lucy Nicholson/Reuters/Landov

The IRS released preliminary figures that show about three-quarters of taxpayers indicated they had qualifying health insurance in 2014. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP