In this case he lives in a different county, so it's a "what if" survey more than anything else. But, even if we did live in the same county I would be honest... if asked.
This does remind me of a former neighbor. He ran for city council. He got ONE vote... his. His own wife didn't even vote for him, and she told him she did (she was very politically active as well)... then the official numbers came out. They had a strained relationship for awhile after that.