SEIU Jumps In Mass Post 16 years ago With their forced unionism agenda threatened, the SEIU has jumped into the Massachusetts Senate race with an attack ad against Republican Scott Brown. The ad buy is a cool $685,000 — straight from the coffers of workers dues money. Share this: Print (Opens in new window) Print Email a link to a friend (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn