If someone wants to be in a union, good for them, they can give all that they want to freely give.
You don’t want to talk about forcibly taking their money.
Why?
Because Walker, and you, could not care less that union members have their dues withheld from their paychecks. You, and Walker, care when the unions support Democrats. When they support Republicans then Walker, and you, are just fine with dues being withheld.