This was a decade ago and we may have even talked about it at the time on the old board.
VW actually supported the union effort, but TN politicians went on to threaten them with a loss of subsidies. And told people that if they voted against the union, VW would bring more business to TN, which wasn’t true.
Do you pay attention to national subsidies in relief packages?
Would local politicians that ran ads and made sketch promises in favor of UAW be interfering?
I’ll interpret a 
answer as: “No, because politicians favoring unionizing is good and therefore I wouldn’t choose a pejorative term like ‘interfere.’”
I’ve never seen that happen. I’ve seen politicians bolster a unionization drive, but not tell people how to vote.
That wasn’t the question. 
So that is more acceptable than taking out ads?
Listen, I am not against unions, but your arguments don’t pass the smell test.
Like I said, this is the perfect opportunity to do an unbiased. apples to apple study, not by Heritage, or by MoveOn, or any other partisan think tank, by an independent, unbiased economist.
You could measure the VW union plant vs. any number of other foreign branded non union plants in the South.
Take 8-10 measurable variables, put them in an envelope and open it up 5 years after the contract is ratified. Then simply look at the data.