This is too funny, and a demonstration on being careful about what you put out there in the Universe.
Not long ago, someone brought up the issue about t-shirts, buttons, and the like that promote a particular candidate being banned from polling places. I did the research on election law here in Illinois and there is no such ban here. In fact, a document on the Illinois State Board of Elections website says that such apparel is allowed in polling places. However, many States are now imposing such bans as recent as this week.
In the long run, I am not sure this will fly under the First Amendment; in fact, I doubt that it will. But, there is no time for the residents of these states to challenge such laws before the election.