This doesn’t even make any sense. Oregon does not recognize same-sex “marriage,” and so the baker was promoting state law.
What the government says, the government imposes ( regardless of whether it’s Federal or State ).
See more news here:
http://www.oregonlive.com/portland/index.ssf/2013/08/bureau_of_labor_and_industries_1.html
Bureau of Labor and Industries orders North Portland bar owner to pay $400,000 to cross-dressers