The original article contains some statistics by party, and yes, there is a correlation between voting Conservative and not wanting to fund Canada Post. Other correlations: rural people tend to support funding Canada Post, people who seldom or never receive mail tend not to. (The rural and Conservative tendencies are going to pull in opposite directions for a fair number of people.) I wouldn’t be surprised to discover that there’s also a correlation with income brackets, but they don’t seem to have collected that information.