On June 21, Rosanne Koss, a Southfield Township Trustee, announced that she had changed her party affiliation from Republican to Libertarian. See this story. Southfield Township Trustee elections are partisan. The population of Southfield Township is 14,547. It is in Oakland County.

Michigan doesn’t have registration by party, so the only objective means for an individual to declare party membership (during a non-election period) is simply by public declaration.