The Supreme Court will consider whether the purchasers of iPhone apps can sue Apple over allegations it has an illegal monopoly on the sale of the apps.

The court said Monday that it will take a case from the U.S. Circuit Court of Appeals for the 9th Circuit, which ruled in January that the purchasers of iPhone apps could sue Apple. Their lawsuit says that when a customer buys an app the price includes a 30 percent markup that goes to Apple.

Apple had argued that it did not sell apps, but instead acted as an intermediary used by the app developers. Apple won initially in a lower court which dismissed the lawsuit.

In Wisconsin, the Democrats prevailed after a trial in which the court ruled that partisan redistricting could go too far and indeed, did in Wisconsin, where Republicans hold a huge edge in the legislature even though the state otherwise is closely divided between Democrats and Republicans.

The Supreme Court said that the plaintiffs in Wisconsin had failed to prove that they have the right to sue on a statewide basis, rather than challenge individual districts.

The Democrats will have a chance to prove their case district by district.

Waiting in the wings is a case from North Carolina that seemingly addresses some of the high court's concerns. The lawsuit filed by North Carolina Democrats has plaintiffs in each of the state's 13 congressional districts. Like Wisconsin, North Carolina is generally closely divided in politics, but Republicans hold a 10-3 edge in congressional seats.

The majority opinion written by Chief Justice John Roberts in the Wisconsin case cast doubt on the broadest theory about the redistricting issue known as partisan gerrymandering.

Roberts wrote that the Supreme Court's role "is to vindicate the individual rights of the people appearing before it," not generalized partisan preferences.