Many of these I would expect but for Bartender I am surprised at the overwhelming lean to the left. What about the old salty barkeeps at all the old salty dive bars across the country? Perhaps they don't give to campaigns (listed data source). I wonder about absolute counts for each occupation in the data and relative amount of contribution across occupations. I'm guessing that there are far fewer Bartenders donating than Neurosurgeons or Chairmans.