I just went to the PA Dept. of State website and downloaded voter registration data. It is up to date to this week. Yesterday was the last day to register for November election.
While the percentage of D’s and R’s have not changed significantly this year, there is an interesting piece of data. Party change applications for the past year have gone in the Republican direction: 160,769 to 120,418. I think it safe to say that people who go through the motions to change parties are likely to vote.
Same in OH!