5 things to know about the health care fight behind the shutdown

Rep. Mike Lawler (right), R-N.Y., confronts House Minority Leader Hakeem Jeffries, D-N.Y., about signing on to a bill that would extend Affordable Care Act tax credits, on Oct. 8.

If Congress doesn't act, costs will rise on premiums for health care plans on the Affordable Care Act marketplaces. Here's what to know about the politics and real-world impact of this issue.

(Image credit: Tom Williams/CQ-Roll Call)