One name is notably absent from the list of prominent conservatives who have lined up against the GOP nominee in the Nov. 3 New York special election: former Arkansas Gov. Mike Huckabee. Even as other past and prospective Republican presidential candidates have offered their endorsements, Huckabee has conspicuously declined to officially support Conservative Party nominee Doug Hoffman, a decision that has left bewildered many of the social conservatives whom he assiduously courted in his 2008 bid. “It’s very disappointing,†said Tom McClusky, vice president for government affairs at the Family Research Council. “You have names out there like Sarah Palin,...