Cite as: 512 U. S. 874 (1994)
Opinion of Kennedy, J.
system with that rule to the system without that rule. But where there is no objective and workable standard for choosing a reasonable benchmark by which to evaluate a challenged voting practice, it follows that the voting practice cannot be challenged as dilutive under § 2. See post, at 887-891 (O'Connor, J., concurring in part and concurring in judgment).
As the facts of this case well illustrate, the search for a benchmark is quite problematic when a § 2 dilution challenge is brought to the size of a government body. There is no principled reason why one size should be picked over another as the benchmark for comparison. Respondents here argue that we should compare Bleckley County's sole commissioner system to a hypothetical five-member commission in order to determine whether the current system is dilutive. Respondents and the United States as amicus curiae give three reasons why the single-commissioner structure should be compared to a five-member commission (instead of, say, a 3-, 10-, or 15-member body): (1) because the five-member commission is a common form of governing authority in the State; (2) because the state legislature had authorized Bleckley County to adopt a five-member commission if it so chose (it did not); and (3) because the county had moved from a single superintendent of education to a school board with five members elected from single-member districts. See Brief for United States as Amicus Curiae 17-18.
These referents do not bear upon dilution. It does not matter, for instance, how popular the single-member commission system is in Georgia in determining whether it dilutes the vote of a minority racial group in Bleckley County. That the single-member commission is uncommon in the State of Georgia, or that a five-member commission is quite common, tells us nothing about its effects on a minority group's voting strength. The sole commissioner system has the same impact regardless of whether it is shared by none, or by all, of the other counties in Georgia. It makes little
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