I don't know if anyone has been following this case but there was an interesting ruling by the District Court that could have some far reaching impact (and not for the good, IMHO).
In summary, ConocoPhillips sued because OK passed a law allowing workers to transport and store guns in a locked vehicle on company property (provided they had been appropriately registered and licensed/etc.).
ConocoPhillips raised two objections to the law:
1. It violated their property rights.
2. It prevented them from meeting the requirements of the OSH Act of 1970.
The court rejected claim #1 and accepted claim #2, overturning the law effective immediately.