Pollsters always get the Trump backed voter wrong. They don't particularly opt to partake in polling because of the vile media angle towards them.
Afterall, would you give personal political information to a 3rd party that called you a terrorist or dangerous to America?
I bet if a polling company needs 700 answers, they call 1000 people, 500 democrats & 500 'gop' is the starting point.
My guess is that 80% of the Dems answer and about 50% of the gops answer and that leads to skewed polling.
Let's be honest, Fetterman needs Philly, Harrisburg & Pittsburgh. The rest of PA is probably Trump country, not so much gop country, and that's where the enthusiasm is coming from...under counting rural turn out whilst over estimating urban turn out absent a top ticket name w coat tails.
That Biden visit was a disaster....last guy Fetterman needed rallying for him