Apparently the author has never heard of labor unions and how they talk to their members about voting. Just to pick one obvious example among many, many other

Apparently the author has never heard of labor unions and how they talk to their members about voting. Just to pick one obvious example among many, many other groups both private and public that do exactly this: suggest how others should vote in order that they be like-minded, right-minded, or benefitting from the same self interest.