Republican voter surge in Pennsylvania. Seven times greater than Democrats. Fact check that. No Fake News. Politico as well as Breitbart reported that the GOP has added almost 198,000 registered voters to the books compared to this time four years ago, whereas Democrats have gained an extra 29,000. Though Democrats still outnumber Republicans by about 750,000 voters in the state, the GOP has seized on their uptick in party members as a sign that Trump is on track to win this critical Rust Belt swing state a second time.