The Supreme Court said Monday it would take up an appeal of a legal challenge to the 2010 health care law, teeing up a high-profile hearing on one of Democrats’ signature issues.

The court did not say when it would hear oral arguments. Health and legal experts following the case say they expect that the court could hear the case sometime in the fall, possibly in October when the new term begins, but is unlikely to rule on it before Election Day. The experts expect the parties in the case to file briefs throughout the summer.

The justices’ decision to hear the case underscores the uncertainty surrounding the status of the health care law heading into the 2020 election and could help solidify health care as a key campaign issue. It will be the third major challenge to the law before the Supreme Court.

“It gives one more reason to be focused on the ACA,” said University of Pennsylvania law professor Allison Hoffman, an expert on health care policy, using the acronym for the law.

The decision comes after the justices said in January they would not expedite the case and hear the challenge, Texas v. California, this term, as the House and state officials defending the law had requested.