Four states–Virginia, New Jersey, Louisiana and Mississippi – have begun redistricting. It’s a grueling process that’s often politically charged. And the U.S. Constitution doesn’t provide many guidelines. The framers laid out how the number of representatives should be chosen, but left it up to the states to decide how to elect them. In some cases, that’s created vastly unequal and unfair districts, and given rise to cases of Gerrymandering. As part of our “The Constitution Today” series, we examine what the document says about drawing congressional and legislative districts and how court decisions have further shaped those guidelines.