The Supreme Court has already heard a major case about political line-drawing that has the potential to reshape American politics. Now, before even deciding that one, the court is taking up another similar case.

The arguments justices will hear Wednesday in the second case, a Republican challenge to a Democratic-leaning congressional district in Maryland, could offer fresh clues to what they are thinking about partisan gerrymandering, an increasingly hot topic before courts.

Decisions in the Maryland case and the earlier one from Wisconsin are expected by late June. The arguments come nearly six months after the court heard a dispute over Wisconsin legislative districts that Democrats claim were drawn to maximize Republican control in a state that is closely divided between the parties.

The Supreme Court has never thrown out electoral districts on partisan grounds and it’s not clear the justices will do so now. But supporters of limits on partisanship in redistricting are encouraged that the justices are considering two cases.

“In taking these two cases, the Supreme Court wants to say something about partisan gerrymandering. It’s clear the Supreme Court is not walking away from the issue,” said Michael Li, senior counsel at the New York University law school’s Brennan Center for Justice.

The justices’ involvement in partisan redistricting reflects a period of unusual activity in the courts on this topic. Over the past 16 months, courts struck down political districting plans drawn by Republicans in North Carolina, Pennsylvania and Wisconsin. Federal judges threw out a state legislative map in Wisconsin and a congressional plan in North Carolina. In Pennsylvania, the state Supreme Court invalidated the state’s congressional districts and replaced them with a court-drawn plan.