The political stakes were unusually high at President Trump's campaign rally in Fayetteville, N.C., on Monday night, with just hours to go until voters there head to the polls in a pivotal toss-up special election that will decide the winner of a long-contested — and long-vacant — House seat.

At the outset of the rally, Trump addressed storm damage caused by Hurricane Dorian in the state and elsewhere, and praised the “many nongovernmental organizations” working on recovery efforts. “North Carolina will truly recover so fast,” Trump said, to cheers.

He quickly turned to the nation's positive economic numbers, noting that “more than 7 million Americans have been lifted off of food stamps” and “nearly 600,000 Americans entered the labor force last month alone.”

“The unemployment rate for African-Americans just reached another brand-new all-time low in the history of our country,” Trump said to sustained applause. “And by the way, African American-youth unemployment has also reached the lowest level ever recorded in history.”

After chants of “four more years!” died down, Trump added: “The labor force participation rate for women is at the highest level now in 15 years, and soon will be 35 years, and soon, I promise, will probably end up being better than ever.”

Dilber Jimenez from Raleigh, N.C., talks about why he supports President Donald Trump before a campaign rally in Fayetteville, N.C., Monday Sept. 9, 2019 (AP Photo/Chris Seward)

Dilber Jimenez from Raleigh, N.C., talks about why he supports President Donald Trump before a campaign rally in Fayetteville, N.C., Monday Sept. 9, 2019 (AP Photo/Chris Seward)

The president enjoys wide popularity within the Republican Party, but a GOP defeat in the red-leaning state on Tuesday could suggest trouble for his reelection campaign. State officials ordered the special election earlier this year, and invalidated a win by GOP candidate Dan McCready in the 2018 midterms, after uncovering alleged ballot fraud efforts.

Before leaving Washington, Trump dismissed questions of whether a poor result for the Republican candidate would serve as a warning sign for 2020.

“No, I don't see it as a bellwether,” Trump said.

Some analysts have said the fraud scandal could undercut the new Republican candidate for the seat, Dan Bishop, and undermine any attempts to draw larger lessons from the race in the state's 9th Congressional District.

Philip Ezzell, left, and his wife, Diane Ezzell, from Marshville, N.C., talk about why they support President Trump as they wait in line to enter his latest rally on Monday. (AP Photo/Chris Seward)

Philip Ezzell, left, and his wife, Diane Ezzell, from Marshville, N.C., talk about why they support President Trump as they wait in line to enter his latest rally on Monday. (AP Photo/Chris Seward)

However, the special election could offer clues about the mindset of Republicans in the suburbs, whose flight from the party fueled the GOP's 2018 House election losses.

The House district flows eastward from the prosperous Charlotte suburbs into rural areas hugging the South Carolina border. State officials invalidated last November's election following allegations of voter fraud by a GOP operative.

NORTH CAROLINA POLITICAL OPERATIVE FACES MORE CHARGES IN BALLOT FRAUD CASE

The district has been held by the GOP since 1963. In 2016, Trump won the district by 11 percentage points. Should Bishop defeat Democrat Dan McCready, it could give Trump room to assert that he pulled Bishop over the top. If McCready prevails or Bishop wins by a whisker, it will suggest GOP erosion and raise questions about Trump's and his party's viability for 2020.

Attendees line up outside hours before President Donald Trump speaks at a campaign rally in Fayetteville, N.C., Monday Sept. 9, 2019 (AP Photo/Chris Seward)

Attendees line up outside hours before President Donald Trump speaks at a campaign rally in Fayetteville, N.C., Monday Sept. 9, 2019 (AP Photo/Chris Seward)

“This will tell us if Trump can carry candidates through suburban districts or not,” said Sarah Chamberlain, president of the Republican Main Street Partnership, which represents moderate Republicans. If not, she said, the GOP must “work harder to address the concerns of suburban individuals, mainly women.”

The rally may also pose a different sort of test: It will be held just over 100 miles from the site of a Trump rally in July where “send her back” chants aimed at a Somali-born American congresswoman rattled the Republican Party. Trump later condemned the chant, which has not been repeated at subsequent Trump events.

Marshville residents Philip and Diane Ezzell, both 70, were near the front of the line Monday waiting to enter the Trump rally. Both attributed their support for Bishop to his backing by Trump.

“We like his values, and he supports Trump,” Diane Ezzell said. “And we don't want no socialist clowns.”

That was a reference to a TV spot by Bishop superimposing the faces of McCready and other prominent Democrats on swaying clown figures.

President Trump participates in a briefing with North Carolina Gov. Roy Cooper, left, and House Minority Leader Kevin McCarthy of Calif., standing center, about Hurricane Dorian at Marine Corps Air Station Cherry Point, Monday, aboard Air Force One. (AP Photo/Evan Vucci)

President Trump participates in a briefing with North Carolina Gov. Roy Cooper, left, and House Minority Leader Kevin McCarthy of Calif., standing center, about Hurricane Dorian at Marine Corps Air Station Cherry Point, Monday, aboard Air Force One. (AP Photo/Evan Vucci)

Cynthia Brown, of Fayetteville, 50, is also attending the rally. Brown, who is black, said supporting Trump has been “a pretty lonely experience” for her. She added, “But that's OK. I'm not a follower.”

While the stakes for the House are high, Trump's trademark rallies inevitably become more about him than the local candidate, as he uses the stage to settle political scores, sharpen attacks and take on perceived foes. After a light rally schedule of late, the president will have plenty of new material to work with.

Chief among them are the White House's worries about the impact an economic downturn could have on a president who has made a strong economy his central argument for a second term. Trump advisers worry that moderate Republican and independent voters who have been willing to give him a pass on some of his incendiary policies and rhetoric would blame him — and, in particular, his trade war with China — for slowing down the economy.

“We don’t want no socialist clowns.”

— Trump rally attendee Diane Ezzell

Trump has increasingly turned to culture-war issues to rev up his core supporters. He's leveled harsh criticism at majority African American cities, like Baltimore, and delivered repeated broadsides against four liberal Democratic congresswomen of color.

Those attacks have been cheered by Trump's advisers, who are bullish on running a campaign critical of Democrats they cast as socialist and unpatriotic. But they went too far for many Republicans, who recoiled when the crowd at a Trump rally in Greenville, North Carolina, in July erupted into a “send her back” chant about Rep. Ilhan Omar of Minnesota.

In the hours before Monday's rally, Trump flew to coastal North Carolina to inspect the damage left by Hurricane Dorian, but bad weather forced officials to scrap those plans. Instead, he received a briefing on Air Force One where Democratic Gov. Roy Cooper told him that three deaths are connected to the storm and that some 3,500 people are without power.

Voter registration workers gather before President Donald Trump's campaign rally in Fayetteville, N.C., Monday Sept. 9, 2019 (AP Photo/Chris Seward)

Voter registration workers gather before President Donald Trump’s campaign rally in Fayetteville, N.C., Monday Sept. 9, 2019 (AP Photo/Chris Seward)

Much of the president's comments about the storm have been about defending his erroneous claim that Alabama was likely to face significant impact from it.

McCready has not had any public events in the district with Democratic presidential hopefuls, though any such appearances by candidates jostling to appeal to liberal voters might not have helped him in the moderate area. But former Vice President Joe Biden and Sen. Elizabeth Warren, D-Mass., two rival candidates, have emailed fundraising solicitations on his behalf. Meanwhile, Vice President Mike Pence will also campaign in the district on Monday for the Republican.

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Democrats captured 39 GOP-held House districts in the 2018 midterm elections, more than enough to give them majority control of the chamber.

Much of that turnover occurred in suburbs, largely in Democratic strongholds like California and New Jersey but also in red-leaning communities near places like Dallas, Oklahoma City and Atlanta. GOP alarm bells have been ringing about the suburbs ever since.

Fox News' Paul Steinhauser and The Associated Press contributed to this report.