The government shutdown has reopened debate on what has been a central issue for both major political parties in the last 15 years: the future of health coverage under the Affordable Care Act.

Tax credits for people who get health insurance through the marketplaces created by the Affordable Care Act, also known as Obamacare, expire at the end of the year.

Democrats say they won't vote to reopen the government until Republicans negotiate an extension of the expanded subsidies. Republicans say they won't negotiate until Democrats vote to reopen the government. Lawmakers in both parties have been working on potential solutions behind the scenes, hoping that leaders will eventually start to talk, but it's unclear if the two sides could find compromise.

As Congress circles the issue, a poll

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