Biggest NYC Union Backs Bloomberg Opponent
District Council 37 Endorses Democratic City Comptroller William Thompson Jr. In Mayoral Race
Biggest NYC Union Backs Bloomberg Opponent -
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Mayor Michael Bloomberg is dealing with a political setback as the city's largest municipal union endorses his chief Democratic challenger.

New York City's largest municipal union is endorsing City Comptroller and Democratic front-runner William Thompson Jr. in the coming mayoral race, posing a major political setback for Mayor Michael Bloomberg.

District Council 37 is backing Thompson Jr., an endorsement that will give Thompson much-needed help against the billionaire incumbent, who has already spent more than $36 million on his third-term bid.

The union has 125,000 members and 50,000 retirees across many city departments. They maintain bridges, roads and subways and work in health care, schools and libraries.

It's a diverse force that will provide Thompson with troops on the ground for his campaign.

Thompson is the Democratic front-runner. Bloomberg, a Republican-turned-independent, is not competing in a primary.

Meanwhile, a July Quinnipiac University poll showed Thompson making up ground on Bloomberg, trailing 47 to 37 percent. Bloomberg had a 54 to 32 percent lead in a poll taken the previous month.