(WASHINGTON) — The Supreme Court is returning to arguments over whether the political task of redistricting can be overly partisan.

The cases at the high court Tuesday mark the second time in consecutive terms the justices will see if they can set limits on drawing districts for partisan gain. Or the court could rule that federal judges should not referee disputes over districts designed to benefit one political party.

Democrats and Republicans eagerly await the outcome of cases from Maryland and North Carolina because a new round of redistricting will follow the 2020 census, and the decision could help shape the makeup of Congress and state legislatures over the next decade.

Last year, the court essentially punted on cases from Wisconsin and the same Maryland congressional district that’s up for consideration Tuesday.

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