As of November 2010, we've analyzed 36 states, district by district, to determine the problems caused by the Census Bureau's method of counting people in prison:
Research in other states is ongoing. Where full district analyses are not yet available for your state, see our report: Fixing prison-based gerrymandering after the 2010 Census: A 50 state guide.
Also available is information about how redistricting works and why counting less than 1% of the U.S. population in the wrong place has such a significant effect: