Sounds reasonable until you look into what I found that made the belief part of someone's dues were being used for political purposes ( meaning candidates or political parties)
Federal and various state campaign contribution laws prohibit dues dollars being used for political campaign contributions.
>FEC regulations also address the scope of a labor organization's participation in federal elections. Most notably, the regulations restrict those labor union communications directed to the general public and to union participation in voter registration and get-out-the vote-drives from containing express advocacy
17 and prohibit coordination with any candidate or political party. The revised regulations permit a labor organization to make registration and get-out-the-vote (GOTV) communications to the general public if such communications: (1) do not expressly advocate the election or defeat of a clearly identified candidate or candidates of a clearly identified political party or (2) are not prepared or distributed with the coordination of a candidate or political party (will subsequently be referred to as "coordinated" or "coordination").
18 A labor union may also distribute to the general public, official registration and voting information and forms and absentee ballots (if permitted by applicable State law) provided that such distributions do not contain express advocacy and are not coordinated.
19 A labor organization may donate funds to State or local government agencies to help defray the costs of printing and distributing these materials.
20 Moreover, a labor organization may also prepare and distribute to the general public the voting records of Members of Congress and voter guides, provided that the these materials do not contain express advocacy and that there was no coordination involved.
21
FEC regulations also permit a labor organization to support or conduct voter registration or GOTV drives aimed both at employees outside its restricted class
22 and the general public, provided that: (1) the labor organization does not expressly advocate the election or defeat of a clearly identified candidate, or candidates of a clearly identified political party; (2) the labor organization does not coordinate with any candidate or political party; (3) the services are not primarily directed at individuals favored by the labor organization; (4) the services are made without regard to the voter's political preference; (5) the workers conducting such services are not paid only to register or transport voters supporting one or more particular candidates or political party; and (6) at the time these services are provided, the labor organization notifies, in writing, those receiving information or assistance regarding registration or voting of the availability of these services without regard to a potential voter's political preference.
23 Finally, a labor organization may donate funds to qualified nonprofit organizations to stage candidate debates.
24<
That can be pointed out only pertains to federal elections.
Unless this 2005 law was changed,
New Jersey Prohibits the use of public sector union dues for political activities and requires specific written authorization for such use in the private sector.
To often things that are not true are believed because no one tries to find out if what is being claimed is true or not.
From SEIU local 109 ( found when searching for union dues and political contributions )
Some of the things dues are used for: Negotiating contracts requires research analysts, negotiators, union reps, and field staffers to organize rallies, worksite actions, and press events. Defending members and enforcing contracts requires money for legal help as well as grievance and arbitration expenses.