The Supreme Court has announced it will consider whether partisan gerrymandering is unconstitutional, in a case that could reshape U.S. politics. The case will consider whether the legislative map drawn by the Republican-controlled Wisconsin State Assembly unconstitutionally favored Republican candidates. The Supreme Court has previously ruled that racial gerrymandering is unconstitutional, but it has never before ruled against partisan gerrymandering, which is when lawmakers redraw districts in efforts to skew the power of either Democratic or Republican voters to benefit their own party.