The ultimate crowd-pleaser was Palin, the Alaskan governor who has ignited the GOP's base and brought new energy to the McCain campaign.
"Here in Pennsylvania, we don't know what to make of a candidate who lavishes praise on working people when they're listening, and turns around and talks about how bitterly they cling to their religion and their guns when they're not listening," Gov. Palin said.
From the top of the ticket, Senator McCain is now more than happy to let Palin continue generating the momentum that has, according to the latest ABC News poll, wiped out Obama's lead and generated a 20 point swing in white, female voters.
"My opponent has never, ever gone against anyone in his own party," said Sen. McCain. "We're proud of the fact that, for the good of the American people, and putting our country first, we have. And that's a matter of record."
Experts say Obama still has a narrow lead in Pennsylvania, a key battleground state. But, the state is still in play, and the battle for its 21 electoral votes will get brutal as the general election draws near.
While the crowd was enthusiastic, not everyone was totally sold on the McCain/Palin ticket.
"I'm intrigued. That s a good word. I think there s a lot to listen to and think about," said Kate Brossman of Lancaster. "But, I still want to hear the other side and make a good, balanced decision."