William C. Thompson (center), a Democratic candidate for New York mayor, speaks after receiving the firefighters union's endorsement on Tuesday, July 9, 2013, in New York. (AP Photo/Bebeto Matthews)

Photo by: Bebeto Matthews

William C. Thompson (center), a Democratic candidate for New York mayor, speaks after receiving the firefighters union's endorsement on Tuesday, July 9, 2013, in New York. (AP Photo/Bebeto Matthews)