This will resolve to (amount/(3,377,674*2))*100%, where amount is the number of votes Trump (or whoever the republican nominee is) gets. (3,377,674 is the number of PA votes Trump got in 2020). If Trump somehow gets more than 6,755,348 votes, this simply resolves yes.

In simpler terms, this is a range of how many votes Trump will get, with 0 votes mapping to 0%, Trump's vote count in 2020 mapping to 50%, and twice Trump's vote count in 2020 mapping to 100%.

This market is mainly used for an option on another market: https://manifold.markets/Robincvgr/what-will-this-markets-trading-volu
I may upgrade it if there is enough interest. I will not bet on this market.