WASHINGTON (AP) — The Supreme Court has agreed to decide a lawsuit threatening the Obama-era health care law, a case that will keep health care squarely in front of voters even though a decision won't come until after the 2020 election.

The court says it will hear an appeal by 20 mainly Democratic states of a lower-court ruling that declared part of the statute unconstitutional and cast a cloud over the rest.

Defenders of the Affordable Care Act argue that the 5th U.S. Circuit Court of Appeals in New Orleans erred when it struck down the health law's now toothless requirement that Americans have health insurance.

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