The probability a district elects a black lawmaker in the Deep South (left panel) versus the Rim South (right panel) depends on the size of a district’s black population. Across the three decades for the given election periods, it is clear that black legislators are elected with smaller black populations in the Rim South relative to the Deep South. In 1993-1995, for example, the probability that a Deep South district elects a black lawmaker reaches 0.5 (even odds) when the black population is between 54 and 55 percent. In that same period, the probability a district in the Rim South elects a black legislator reaches 0.5 when the black population is between 49 and 50 percent. This 5 percentage-point difference nearly doubles in 2003-2005 (52 to 53 percent for the Deep South versus 43 to 44 percent for the Rim South) and in 2013-2015 (48 to 49 percent for the Deep South versus 40 to 41 percent for the Rim South).
Beyond the pressing normative views regarding the broader political and representational implications of the relationship between majority-minority districts and black representation, our empirical analysis indicates an inexorable dynamic in party politics. Our findings leave no doubt that a considerable reduction in majority-minority state legislative district populations can be accomplished while ensuring black descriptive representation. In light of the Supreme Court’s 2013 decision in Shelby County v. Holder, which scrapped the federal enforcement of the Section 5 preclearance provision of the Voting Rights Act, we expect in the next decennial round of redistricting most Democrats will push for a reduction in the size of minority populations in majority-minority districts, while almost every Republican will continue to insist that majority-black districts should remain as is, or better yet, contain even higher African-American populations.
Dr. Carl Klarner has posted “Assessing the Potential Impact of Evenwel v. Abbott” on SSRN. I look forward to contributing more to this important preliminary analysis of the representational impact of the Evenwel v. Abbottcase that SCOTUS hears tomorrow morning, weighing the “one-person, one-vote” principle under the Equal Protection Clause. Klarner’s analysis shows the potential impact on representation when instead of total population, districts are apportioned based on the number of citizens who live in state and congressional legislative jurisdictions, or, even more narrowly, when districts are apportioned based only on the number of citizens over the age of 18 (CVAP). His empirical analysis goes beyond recent analyses conducted by Michael Li & Eric Petry at the Brennan Center and by Andrew A. Beveridge, Professor of Sociology at Queens College. In this iteration, Klarner “assesses the potential impact of such a ruling on the political power of African-Americans, Latinos, individuals residing in poverty, as well as the extent of the electoral advantages a ruling might provide to the Republican Party.” The findings are stark.
The U.S. Supreme Court will hear Evenwel v. Abbott on December 8, 2015. If the high Court rules in favor of the plaintiffs, redistricting across the country will be accomplished by nearly equalizing the number of people eligible to vote in a jurisdiction instead of the current standard of nearly equalizing the total population of legislative districts. This analysis assesses the potential impact of such a ruling on the political power of African-Americans, Latinos, individuals residing in poverty, as well as the extent of the electoral advantages a ruling might provide to the Republican Party. It draws on Census data first available on December 3, 2015 and a database of all state legislative elections from 1968 to 2015. It finds that drawing districts on the basis of citizens of voting age would reduce the power of Democratic state legislators by 1.4% in state houses, 1.2% in state senates, and 1.1% in the U.S. House. The representation of Latino state house members would go from 8.4 to 7.4%, 6.7 to 5.8% in state senates, and 6.7 to 5.8% for the U.S. House as well.