I’m a Pennsylvanian, and I believe the answer is corn.

Looking at the question at a broader level, though, I’m sickened to say that it’s Trump supporters.

When I was growing up, Pennsylvania was decidedly a blue state.  Lots of affluent, well educated people in Pittsburgh and Philadelphia, and not enough yokels in between to make a real difference.  Imagine my shock and disappointment when the Keystone State went for Trump in both 2016 and 2024.