The Indiana Legislature consists of a 50-member Senate and a 100-member House of Representatives. In early 1981, following the 1980 census, the Republican-controlled General Assembly initiated reapportionment of the state's legislative districts. The resulting 1981 Reapportionment Act created 50 single-member Senate districts and, for the House, 7 triple-member districts, 9 double-member districts, and 61 single-member districts. The plan was drafted by Republican leadership with the assistance of a private computer firm using precinct-level political data, passed along party lines over unanimous Democratic opposition, and signed into law by the Republican Governor.
In early 1982, several Indiana Democrats, including state legislators, local officials, and private citizens, filed suit against state officials alleging that the 1981 plan constituted a political gerrymander intended to disadvantage Democratic voters in violation of the Equal Protection Clause of the Fourteenth Amendment. A three-judge District Court was convened to hear the claims.
In November 1982, the first elections were held under the new districting plan. Democratic candidates received 51.9 percent of the statewide House vote but won only 43 of 100 seats, and 53.1 percent of the Senate vote but won 13 of the 25 seats up for election. In Marion and Allen Counties, which used multimember House districts, Democratic candidates received 46.6 percent of the vote but won only 3 of 21 seats.
After trial, the District Court found that the plan intentionally discriminated against Democrats on a statewide basis, that the discrimination was likely to continue throughout the decade, and that it would deny Democrats a fair chance to influence the political process. The court declared the plan unconstitutional, enjoined its enforcement, and ordered the General Assembly to prepare a new plan.
The defendants appealed, seeking review of the District Court's rulings on justiciability and the existence of an equal protection violation. The Supreme Court noted probable jurisdiction.
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