the defendants conceded that, as a general rule, homogenous precinct analysis may be more reliable than ecological regression, we cannot say that the district court clearly erred in accepting Mag-giotto's numbers and treating the election as arguably split-preference. 5 . The defendants also argue that, even if there is a statutory violation, Section 2 should not be enforced because it is unconstitutional under the Equal Protection Clause, principles of federalism, and' the "congruence and proportionality” test established by City of Boerne v. Flores, 521 U.S. 507, 117 S.Ct. 2157, 138 L.Ed.2d 624 (1997). We need not address this argument in light of our holding that Section 2 has not been violated. See Slack v. McDaniel, 529 U.S. 473, 485, 120 S.Ct. 1595, 1604, 146 L.Ed.2d 542 (2000) (<HOLDING>) (quoting Ashwander v. TVA, 297 U.S. 288, 347,
holding that a district courts ruling may be upheld on an alternative ground supported by the record holding that judgment may be affirmed on any ground supported by the record holding that a successor judge may consider a motion for new trial in a case tried to the court where she is not required to weigh conflicting evidence or pass upon the credibility of witnesses but can resolve such issues  upon evidence which is not materially in conflict holding that to preserve an issue for appellate review the specific legal argument or ground upon which it is based must be presented to the trial court recognizing that courts should not pass upon a constitutional question although properly presented by the record if there is also present some other ground upon which the case may be disposed of