The targets include U.S. Sen. Scott Brown of Massachusetts, two senatorial candidates, Linda McMahon in Connecticut and Richard Mourdock in Indiana, and three candidates for governor -- Rick Hill in Montana, Ovide Lamontagne in New Hampshire and Rob McKenna in Washington -- The Hill reported Friday.
The first mailings are to be sent next week to 180,000 households where at least one person belongs to an AFL-CIO union.
"Working families trust the information they get from their unions," said Mike Podhorzer, AFL-CIO political director. "This election we're drawing a hard line between those who will stand up for the middle class and those who are throwing them under the bus."
The AFL-CIO, which has endorsed U.S. President Barack Obama for re-election, has more than 50 member unions with millions of members.
Notable deaths of 2014 [PHOTOS]