For months, Democratic presidential candidates have been swarming Iowa, seeking support for the caucuses on February 3. Healthcare -- and how to pay for it -- is one of the biggest issues for voters.

Across the Midwest, health care has emerged as one of the year’s biggest campaign flash points—in races from U.S. Senate to state attorney general. In Illinois, Missouri, Ohio and Indiana, speeches, debates and ads highlighting partisan disputes over major health care issues. Among them: the Affordable Care Act, a single-payer health system and decriminalization of drug use.