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MARION, IA - AUGUST 16:  Democratic presidential candidate U.S. Sen. Bernie Sanders (I-VT) greets supporters while he campaigns on August 16, 2015 in Marion, Iowa. Sanders has a full day of campaigning scheduled in eastern Iowa today.  (Photo by Win McNamee/Getty Images)
MARION, IA - AUGUST 16:  Democratic presidential candidate U.S. Sen. Bernie Sanders (I-VT) greets supporters while he campaigns on August 16, 2015 in Marion, Iowa. Sanders has a full day of campaigning scheduled in eastern Iowa today.  (Photo by Win McNamee/Getty Images)

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    Bernie Sanders releases Medicare plan details

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Bernie Sanders releases Medicare plan details

Sen. Bernie Sanders released details of his Medicare-for-all health plan hours ahead of NBC News' Democratic debate. CNN's Eric Bradner has the latest.

Bernie Sanders releases Medicare plan details

Sen. Bernie Sanders released details of his Medicare-for-all health plan hours ahead of NBC News' Democratic debate. CNN's Eric Bradner has the latest.