Colin McPherson sought to put Sue Kay on the defensive early when responding to a question about a proposed affordable housing project on Pond Street that may be supported by Community Preservation Act money. McPherson stressed that, unlike him, Kay supported the town's adoption of the state's Community Preservation Act and sits on is a member of the board of directors of the nonprofit organization that wants to build the Pond Street project. Weymouth voters adopted the state law in 2005. It imposes a property tax surcharge that can be used in part for affordable housing projects. "Since my colleague's speaking for me, I guess I'll tell you exactly how I feel about it," Kay said with a smile, defending her position on the project and the preservation act. The exchange Thursday night between the two mayoral hopefuls highlighted a candidates' night organized by the East Weymouth Neighborhood Association. About 100 voters turned out at the Weymouth Elks Hall...