Roughly one in 10 Americans is uninsured, but many more struggle to pay their medical bills.

Created in 1965, this federal program provides health insurance for roughly 60 million elderly and disabled Americans. It covers hospitalization, rehabilitation and doctors' visits, but not vision, hearing, dental and long-term care

But these policies have become much more expensive in recent years. Annual premiums for a family plan cost almost $20,000, on average, last year,with workers contributing about $5,550 and employers paying the rest, according to another Kaiser survey.Since 2008, average family premiums have increased 55%, twice as fast as workers' earnings and three times as fast as inflation, according to Kaiser

Roughly half of Americans --or more than 150 million people --get their health insurance through their jobs today.Three-quarters of the public have favorable views of work-based coverage, according to a new poll by the Kaiser Family Foundation. Of those with such plans, 86% rate their coverage as either "excellent" or "good

Health care has emerged as a key fault line for Democrats. All of them want to make changes, but their plans vary widely --from building on the

This is Obamacare, and it affects all Americans' health care today. Passed in 2010, the landmark law made sweeping changes to the nation's health care system. Some of its more notable provisions included creating the individual insurance market exchanges and expanding Medicaid to more lower-income Americans, both of which began in 2014.

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