During the early 1990s the Department of Justice used its Voting Rights Act power to object to racially unfair redistricting laws to force states to maximize minority congressional districts. The results were dramatic: Congressional Black Caucus membership swelled from 25 to 38 and nine new Hispanic congresspersons were sworn in. Only three years later, the maximization strategy lay in ruins. The courts forced many of the new minority districts to be redrawn and the judiciary reserved especially harsh criticism for the Department.

Cunningham examines and analyzes how the Department came...