In the first month since he arrived in Cambridge to assume a tenured post at the Law School, Professor Jack L. Goldsmith has received a frosty welcome from a small faction of faculty who have questioned his scholarship and called for an investigation into his work as a Bush administration official. More than 80 percent of the school’s faculty voted by secret ballot to confirm Goldsmith’s tenure appointment in the spring, and longtime Harvard Law professors have rallied to defend their new colleague as well as to praise his academic credentials. But a small group of senior faculty members who...