at one time margarine (oleo) was banned in wisc.
Margarine ought to be banned - everywhere
My recollection was that colored margarine was banned. You could still buy pale margarine that didn't look like butter, and you could even get packs of coloring that you'd have to mix it in yourself. Nobody in Wisconsin wanted that hassle, so we'd just smuggle in normal colored margarine from Illinois if we wanted some. Of course real butter did taste better than margarine; it was just much more expensive as a result of the protection from competition that the state government gave to dairy farmers.
My father tells tales where he, as a kid, had to fold color packets into margarine. At the time, it was illegal (Michigan) for margarine to be colored like butter.
Then I was a manager in a margarine factory. Seeing machines bind up because of “polymerized” margarine was enough for me. Never touched the stuff again.
As it should be. Stuff is really bad for you.