On June 27, the U.S. Supreme Court said it will hear McCrory v Harris, 15-1262. This is a North Carolina lawsuit over U.S. House district boundaries. The lower 3-judge U.S. District Court had invalidated the state’s districts, forcing North Carolina to hold a late primary this month just for U.S. House, because the districts had not been in place at the March 2016 primary.
In February 2016 the U.S. Supreme Court had declined to block the new districts, which suggests that when the U.S. Supreme Court hears the case, it is likely to uphold the decision of the 3-judge U.S. District Court.