Senator Scott Brown, who has earned kind words from Boston Mayor Thomas M. Menino despite their differing political parties, treaded carefully Friday when asked during a Boston.com chat about the mayor’s spat with Chick-fil-A over its opposition to gay marriage.

“I disagree with what the CEO from Chick-fil-A said. I was glad he spoke further and said that his company does not discriminate,” Brown wrote from his South Boston campaign headquarters.