joe biden won in 2020 and so did donald trump in 2016. polls this year have the candidates and neck, and that is where we find caitriona perry in pennsylvania. great to see you. caitriona: we were in michigan a couple days ago, we have come through ohio and now we are in pennsylvania near lake erie behind us. taking the temperature really of voters here in these key battleground states. it was pennsylvania that ultimately fell for joe biden in 2020, putting him over that 270 mark of the electoral college votes and putting him into the white house. as it was in that cycle as it is now, economic issues like inflation, the cost of living are matters that dominate, as we've been hearing from voters here. erie, pennsylvania, formerly a rustbelt hotspot. as jobs left, so did the people. the population has declined by 40,000 since the 1970's. the cost of living a problem, as food prices have risen by almost 25% in four years. rising faster in pennsylvania than in any other state this year. erie is a swing county in this swing state. as president