Senator Bob Corker probably "broke the law".

[WinkyDink]

31. My Google worked pretty fast:

The National Labor Relations Act requires "laboratory conditions" for union elections in which workers are free to make decisions about organizing without being coerced or unduly influenced.

Regardless of whether Corker, pictured below, can be held personally liable, his statements could potentially invalidate the results of the unionization vote, which should be released Friday evening.....

Many observers pointed out that if the assurances Corker spoke of came directly from VW, it would make the Senator a conduit for the company in attempting to influence the vote outcome, which would be a clear violation of federal labor law.

The law in question is the 1947 Taft-Hartley Act, which codified an employer's First Amendment right to oppose a union, so long as the company does not attempt to influence workers' decisions by threatening reprisals or offering incentives if they vote one way or the other....

http://america.aljazeera.com/watch/shows/the-stream/the-stream-officialblog/2014/2/14/did-sen-bob-corkerviolatefederallaborlaw.html