Indeed. Silber running to Weld's right cost him many normally democratic liberals, many of whom defected to Weld. Cambridge voting for Weld is probably the most obvious proof.
Here's some proof of how far to Weld's right Silber was. Source: http://en.wikipedia.org/wiki/John_Silber
(I am aware this has been posted in another thread, BTW.)
In 2002, Silber ordered that Boston University Academy disband its gay-straight alliance, a student club that staged demonstrations to publicize the deleterious effects of homophobia. Silber dismissed the stated purpose of the club -- to serve as a support group for gay students and to promote tolerance and understanding between gay and straight students -- accusing the club of being a vehicle for "homosexual recruitment." Silber denounced the group for "evangelism" and "homosexual militancy" with the purpose of promoting gay sex.