1990 africanamericans cartography census circonscriptionsélectorales civilrights congress courts demography economicconditions electiondistricts elections geographicinformationsystems gerrymandering government hispanicamericans house lawandlegislation laws legalstatus legislativebranch minorities noirsaméricains partyaffiliation politicalactivity politicalaspects politicalquestionsandjudicialpower politicalscience politicsandgovernment politiqueetgouvernement populationgeography racediscrimination racerelations representativegovernmentandrepresentation rockymountainsregion répartitiondessièges socialconditions states suffrage texas unitedstates voterregistration voting