"Gerrymandering describes the intentional manipulation of district boundaries to discriminate against a group of voters on the basis of their political views or race." -The Brennan Center for Justice
How Does Gerrymandering Work in Practice?
Electoral district boundaries undergo the redraw process every ten years, after the decennial census. This is to ensure that all districts are equally populated, and representitive of a state's population. In most states, the districts are drawn up and voted through by the state legislatures. Legislative committees are appointed to draft the redistricting plan, and they pass or do not pass in the same manner as regular legislation, with the governor having the privilege of a veto. There are notable exceptions to this basic structure, though.
Gerrymandering Deforms Elections