WILKES-BARRE, Pa. (AP) — Donald Trump is mobilizing voters on Saturday in northeastern Pennsylvania, part of the crucial swing state, where he hopes conservative, white working-class voters near President Joe Biden’s hometown will boost Republicans’ chances of retaking the White House.

In 2016 and 2020, Trump crushed his Democratic rivals in the county, which includes the blue-collar city of Wilkes-Barre. This Rust Belt region, which is home to Biden’s hometown of Scranton, gives Trump hope and helps him highlight the Democrats’ post-presidential weaknesses. ended his re-election campaign And Vice President Kamala Harris started their campaign.

The rally takes place as Democrats prepare for their four-day National Congress The meeting begins in Chicago on Monday and marks the party’s welcome of Harris as its nominee. Her replacement from Biden less than four months before the November election gave new momentum to the Democrats and their coalition and presents a new challenge to Trump.

He has sharply criticized Harris over the economy, linking her to the Biden administration’s inflation problems and comparing her to her latest proposal against price gouging on measures in communist countries. Trump says a nationwide ban on food price gouging would lead to food shortages, rationing and hunger.

During his visits to the country’s second-largest natural gas state, Trump has mentioned Harris’s past opposition to fracking, a method of oil and gas extraction. Campaign has tried to soften its stanceand said she would not ban it, although this their position when she ran for the 2020 presidential nomination.

Some Democrats in Pennsylvania acknowledge the challenges but say the economy is the region’s biggest concern.

Pennsylvania Lieutenant Governor Austin Davis said in an interview that voters are “really hot.” David Harris’ rally in Philadelphia to introduce her running mate, Minnesota Governor Tim Walz, as well as 36 field offices, including several in Republican-leaning parts of the state.

“The energy has clearly shifted dramatically toward Vice President Harris,” Davis said, arguing that Trump “is just going on confused rants and attacking Harris personally.”

On Sunday, Harris is planning a bus trip that will begin in Pittsburgh and stop in Rochester, a small town further north. Trump has planned a visit to a factory in York that makes containers for nuclear fuel on Monday. Trump’s running mate JD Vance is expected in Philadelphia that day.

Trump’s rally on Saturday will be his fifth at the arena in Wilkes-Barre, the largest city in Luzerne County, where he won the last two elections. Biden defeated Trump in neighboring Lackawanna County, where the Democrat has long emphasized his working-class roots in Scranton.

Some of Biden’s loyal supporters in this former industrial city of 76,000 were angry that party leaders were pushing the president to resign.

Diane Munley, 63, says she called dozens of members of Congress to lobby for Biden. Munley eventually came to terms with Biden’s decision and is now a strong supporter of Harris.

“I can’t deny the excitement that exists right now for this ticket. I’m so excited,” Munley said. “It just didn’t work out for Joe, and I couldn’t see it at the time because I was so close to him.”

She said she doesn’t know a single Democrat or independent in her circle of several hundred people who doesn’t fully support Harris and Walz.

“We are fully committed to Kamala Harris,” Munley said. “We are 110% committed to Kamala Harris.”