Cite as: 532 U. S. 234 (2001)
Opinion of the Court
C
The District Court found that the testimony of the State's primary expert, Dr. Peterson, was " 'unreliable' and not relevant." 133 F. Supp. 2d, at 420 (quoting Dr. Weber and citing Tr. 222-224, 232). Dr. Peterson's testimony was designed to show that African-American Democratic voters were more reliably Democratic and that District 12's boundaries were drawn to include reliable Democrats. Specifically, Dr. Peterson compared precincts immediately within District 12 and those immediately without to determine whether the boundaries of the district corresponded better with race than with politics. The principle underlying Dr. Peterson's analysis is that if the district were drawn with race predominantly in mind, one would expect the boundaries of the district to correlate with race more than with politics.
The pages cited in support of the District Court's rejection of Dr. Peterson's conclusions contain testimony by Dr. Weber, who says that Dr. Peterson's analysis is unreliable because (1) it "ignor[es] the core" of the district, id., at 223, and (2) it fails to take account of the fact that different precincts have different populations, id., at 223-224. The first matter—ignoring the "core"—apparently reflects Dr. Weber's view that in context the fact that District 12's heart or "core" is heavily African-American by itself shows that the legislature's motive was predominantly racial, not political. The District Court did not argue that the racial makeup of a district's "core" is critical. Nor do we see why "core" makeup alone could help the court discern the relevant legislative motive. Nothing here suggests that only "core" makeup could answer the "political/racial" question that this Court previously found critical. Cromartie, 526 U. S., at 551-552.
The second matter—that Dr. Peterson's boundary segment analysis did not account for differences in population between precincts—relates to one aspect of Dr. Peterson's
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