Former Vice President Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE has chose to base his presidential campaign in Philadelphia, the largest city in a key Rust Belt state crucial to any path to victory.

“We’re proud to anchor our campaign in the birthplace of American democracy,” Biden's campaign manager, Greg Schultz, said in a statement.

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“Philadelphia is a thriving city and a testament to the American spirit, built by the ingenuity and tenacity of ordinary people who did extraordinary things," he added. "Its storied history and celebrated diversity will serve as an inspiration for Team Biden, and is the ideal setting to continue our fight for the soul of this nation.”

Biden will hold a rally Saturday in the City of Brotherly Love, his campaign said.

Pennsylvania, along with Michigan and Wisconsin, will undoubtedly emerge as one of 2020’s most competitive battlegrounds after President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE bucked a decades-long blue streak and won the state in 2016.

Senior advisers to Trump’s 2020 reelection campaign are reportedly concerned about the president’s chances for reelection in Pennsylvania after his narrow victory there by less than 1 point.

Biden, who hails from the Keystone State, has angled his campaign’s appeal toward winning back white working-class voters who traditionally voted Democrat but supported Trump over Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE. He has played up his Scranton roots early on during his White House bid to suggest he understands the struggles of America’s blue-collar workers.

The former vice president has emerged as the crowded Democratic primary’s pacesetter, placing at the top of every national poll released since he announced last month and raking in millions of dollars in donations.