The top contributors for each of four candidates in the District 1 supervisorial contest this March is predictable based on the thumbnail sketch of each of their supposed strengths. State Sen. Bob Wieckowski is backed labor unions, along with his colleagues in the state Senate. Vice Mayor Melissa Hernandez is backed by police unions and other labor unions. Fremont Councilmember Vinnie Bacon is supported by family and average voters, and Dublin Mayor David Haubert is backed by developers.