Two labor groups recently donated to Majority Action.
The Service Employees International Union's Political Education and Action Fund gave $200,000 in May, the SEIU's NYS Political Action Fund gave $150,000 in June and the United Food and Commercial Workers Union gave $100,000 in June.
A spokesman for U.S. Sen. Elizabeth Dole argued that the donations are being used by Majority Action — and by extension, the Kay Hagan campaign — to pay for issue ads attacking Dole.
"Her campaign is in the pocket of Big Labor," argued Dole spokesman Hogan Gidley.
But Bill Buck, executive director of Majority Action, said that there was no direct tie between the two unions and the Dole ads.
"They have contributed to Majority Action, but they can't make donations that are tied to an ad," he said.
The Hagan campaign said they have no connection to the Majority Action ads.
Mark McCullough, a spokesman for the SEIU, also disputed Dole's attempt to link a visit by the Democrat to the AFL-CIO's annual executive meeting in Chicago Monday to the Majority Action ad.
He noted that the SEIU and the UFCW are members of the Change to Win Federation, which was created in 2005 as an alternative to the AFL-CIO coalition.

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"Basically, our media consultant used the wrong stock footage, but it was corrected," Dole spokesman Hogan Gidley told the newspaper.