e board of Log Cabin Republicans, the largest group for gay men and lesbians in the party, voted overwhelming last night against endorsing President Bush for re-election because of his support for a proposed constitutional amendment banning same-sex marriage. The decision ends six months of soul-searching as the group, which endorsed Mr. Bush in 2000 and Bob Dole in 1996, wrestled with its divided loyalties. Although the group was immediately critical when the president announced his support for the amendment in February, it pointedly refrained from ruling out an endorsement. Its effort to balance loyalty to the party with opposition...