Two of nation's largest unions in Dean camp LEIGH STROPE, AP Labor Writer
Backing from both the Service Employees International Union, with 1.6 million members, and the American Federation of State, County and Municipal Employees, with 1.5 million, would help transform Dean from surprise insurgent to solid front-runner in the Democratic presidential race.
SEIU endorsed Dean on Thursday, but delayed a formal announcement until next week at the request of AFSCME, which is prepared to follow on Wednesday, several Democratic and labor officials said.