We actually had a couple
The first race we had, there were democrats and republicans. I was asked to run on the Republican ticket since the original owner (halfwhitmemes) wanted a number of people to run from each party.
The second race, it was still kind of a thing, but the person who ended up winning (anonymously.deleted) ran as an independent.
Then the third race, there were like 4 or 5 different parties that got made up. It was pretty confusing. I wasn't very active in the stream at the time, so it was more confusing to me than it might have been to others.
This race, the parties didn't really come up at all, and I'm fine with that.