[sjs382]

To avoid the religion argument, let's switch it to a shirt with a big marijuana leaf on it.

In that case, yes. Unless the person is a voter in the act of voting.

[NoodleIncident]

I didn't think voters were allowed to have political clothing either? I've heard of some voters asked to turn masks and shirts inside out while they're at the polls.

[zjs]

The PDF linked from the post clarifies the rule for PA: "Wearing a t-shirt or button supporting a candidate, campaign, or political party (except voters in the act of voting)"

(Other jurisdictions may have other rules, of course)