The Service Employees International Union in Pennsylvania Monday endorsed Democrat Dan Onorato for governor, pledging to throw the weight of its 100,000-worker membership into the fight.
Members across Pennsylvania work in health care, government, building services, food service, laundry and in the hospitality industry.
"It's getting harder for working Pennsylvanians to provide for their families," said Gabe Morgan, President of the SEIU PA State Council and Western Pennsylvania Director of the union. He said that Onorato, the Allegheny County executive, has "worked to bring good jobs into the community."
The endorsement includes state Sen. Scott Conklin, the Democratic nominee for lieutenant governor.
SEIU is known for its political-mobilization skills. In 2008, union staff and volunteers contacted 1 million voters on behalf of the Obama campaign.
The SEIU council endorsed Sen. Arlen Specter (D.,Pa.) in the May 18 primary, but is expected to soon announce its support for Senate nominee Joe Sestak, a member of the U.S. House from suburban Philadelphia.