I think you're missing the part where it says this 24% is 9 points higher than Trump's 15% from exit polls in 2016.......in which Trump won Pennsylvania. What it really tells me is how fucking bullshit these polls are. Basically they tried to skew the numbers by polling people they assumed would vote Biden, and of that specifically targeted for a desired result group Trump has 60% more votes than he did the last time when he won the state.