Thank you, Quazi!
"The fact that we are here today to debate raising America's debt limit is a sign of leadership failure" - 2006 Senator Obama...leadership failure indeed!
Union tend to vote democrat and give money support to democratic candidates and causes. When you force everyone to pay dues, everyone has to contribute to the democratic party even if your affilation is another party or no party.
The fear the union leaders and democrats have is competition, since they now have a monopoly on union dues. It is conceivable that a republican union could form, based on members of the current unions, who like being in the union, but are currently being forced to shoot themselves in the foot.