Who would want to be a member of a union that didn't engage in political lobbying? That would indicate a very weak union.
You could also drive an hour to save 3¢/gallon on gas.
This data comes to us from the BLS via an organization whose homepage lists services such as "Counter Union Campaigns", "Union Avoidance", and "THE UNION-FREE PRIVILEGE®".
https://web.archive.org/web/20210329213754/https://www.doitw...
I worked for a company with two plants, one unionized and the other one not. For the same job, the unionized plant paid approximately 20% more than the non-unionized one for the same jobs. A 1% due rate would have been a steal of a deal.