Why not. If they are forced to pay someone for a job, then yes. If the Union actually does something to make their job better, or protect good workers under attack, then why not. It would be the same thing as a legal fee. I also think that they should be able to mark a box to decide who the unions donate their dues to as well. If they are going to donate to Democrats, the Republican workers should have the right to have their share of the money donated to the RNC.