A recent controversy has been what is vodka. Or, what are the allowable ingredients for vodka.
Pressure from more or less traditional vodka countries within the EU to make a ruling that everything except grapes (see above for some of the names of those clear alcohol spirits) could be used to make vodka. Spirit made from grapes had to be called something else - usually a name with zero recognition beyond the country of origin and even within those countries the names had generally negative connotations. This was obviously a attempt at protectionism. This rule was recently shot down after a fight by the Gin and Vodka Association in England.