First of all what you have posted is against the law, dues money cannot be used to be given to a candidate or a party, (dont let the facts get in your way).So is life, What's your point?
Unions have pumped BILLIONS into the Democratic Party only to have law after law passed that screw the average Joe/Jane on a daily basis by Democrats.
Unions have PACs which members VOLUNTARILY give their own money too, that can be used as its not union dues, union dues can be used for political education and GOTV campaigns.
And Corporate America gives way more than any union affiliated PAC.
Educate yourself, or at least prove billions in dues money were given.