The head of a powerful service workers union threatened Tuesday to unleash money from a $10 million "accountability" fund against any political figure -- Democrats included -- who breaks promises to organized labor.

"Any Democrat -- or Republican -- who said they were going to support us on health care or free choice and turns against us is going to paint a target" on their backs, Andy Stern, president of the powerful Service Employees International Union, told The Associated Press in an interview. "...We're not going to just win this election and hope Barack Obama does well. People want something to happen."

The SEIU intends to keep a close watch on candidates to make promises to support changes in health care and accessibility to union representation in the workplace. It already has helped unseat one moderate Democrat, former Rep. Al Wynn of Maryland, by supporting his Democratic primary opponent -- Donna Edwards.

"Our members are sick and tired of politicians who are after their votes the day before the election and after their throats" later, Stern said.

The organization has donated more than $25 million, mostly to Democratic candidates, since 1989. But the SEIU also is branching out beyond being affiliated with just Democrats. It also is helping to sponsor the Republican National Convention in Minneapolis-Saint Paul, for example.

An estimated one-third of union members voted for President Bush in the last presidential election, with more than 300,000 of the 2 million SEIU members currently registered Republicans, Stern said.

"For our members, politics is not about Democrats or Republicans or left or right, it's about right and wrong," he said.

The SEIU was Obama's first major union supporter, and was rewarded with three speaking slots at the Democratic National Convention -- Illinois SEIU president Tom Balanoff, who spoke on Monday; and on Tuesday secretary-treasurer Anna Burger, who is also chair of labor organization Change to Win and Pauline Beck, an SEIU home health care worker whom Obama visited and worked with during the Democratic primary.