To date, the United States Supreme Court has never struck down an election map on grounds of political gerrymandering, though the lower courts have addressed the issue to some extent. The Supreme Court has, however, struck down electoral maps on grounds of racial gerrymandering – i.e., the practice of drawing political districts in order to dilute the vote, and thus the political representation, of voters from racial minorities. And the Court has left open the possibility that some kinds of partisan political gerrymandering may be too extreme to survive constitutional scrutiny.