Vice President Kamala Harris spoke at a campaign event Wednesday in Bucks County, just two days after she visited western Pennsylvania for a rally in Erie.

Harris is the latest candidate to woo voters in the Delaware Valley this week; in a span of two days, former President Donald Trump, his running mate JD Vance, President Biden and first lady Jill Biden all attended events in the Philadelphia area and surrounding suburbs.

Harris spoke at Washington Crossing Historic Park, where she was joined by dozens of Republicans, including former GOP lawmakers and ex-Trump aides who are supporting her candidacy.

She was introduced by a Bucks County couple who voted for Trump in the past and who are now backing Harris.

Harris' speech did not focus on policy but honed in on what she says is at stake in the race.

"What is at stake in this race are the Democratic ideals that our founders and generations of Americans before us have fought for. At stake in this election is the Constitution of the United States it very self. We are here today because we share a core belief — that we must put country before party," she said.

Banners and signs at the event said, "Country over party."

Both Harris and Trump have ramped up the time spent in Pennsylvania over the last several weeks in an effort to win the state's 19 electoral votes on Nov. 5. And within the battleground state, Bucks County has become a key prize for both parties.

In 2020, Mr. Biden won Bucks County by just 4% over then-President Trump. Republicans have been working to flip the county ahead of the 2024 election, adding thousands of new registrations since February and giving the GOP a slight edge over Democrats with the number of registered voters.

The last time a Republican presidential candidate won Bucks County was in 1988, but following the debate between Harris and Trump in September, voters told CBS News Philadelphia they weren't moved off their candidate of choice.

Last month Vance spoke at Bucks County's Newtown Athletic Club's Sports and Events Center, where he criticized the "failed leadership of Kamala Harris" and urged voters to get their families to support Trump in November.

Harris is slated to return to Pennsylvania next week. Officials with the Trump campaign say the former president will be back in Philly area this weekend for an event at a local McDonald's.