And why you need to be alert while your state redraws congressional districts next year in response to the census.Why bother stuffing ballots when you can just draw districts to ensure your re-election? The new documentary Gerrymandering exposes what executive producer Bill Mundell calls “the most effective form of manipulating elections short of outright fraud.”Mundell sat down with Reason.tv’s Tim Cavanaugh to talk about the new documentary, the consequences of political redistricting, and what can be done to un-rig elections.