The 9-0 decision set aside a new map of congressional districts drawn by a special federal court in San Antonio that gave Latinos and Democrats a good chance to win three or possibly four new seats in the House of Representatives.
Does anyone know what type of spatial analysis - if any - was used to create the evidence presented?
Update: Thanks to mkennedy for interpreting this, and also for pointing me in the direction of preclearance. I see that the Federal Register Vol 76 No. 27 Part III goes into what I was wondering about under the "Retrogressive Effects". Fortunately, this is very googleable.