With five days to go until Election Day, Vice President Kamala Harris’ campaign is projecting confidence in its chances in next week's contest, while pledging that it is prepared for any potential effort by former President Donald Trump and Republicans to challenge the results. 

Speaking on a call with reporters on Thursday, senior officials with Harris’ campaign warned that Trump was currently seeking to “lay the groundwork” to claim the election was stolen if he loses next week. 

“This week, we are seeing that Donald Trump is clearly worried that he's going to lose the election,” a senior official said on Thursday. "How do we know that? Well, we know it because he's ramping up baseless claims of election fraud and irregularities.”

Trump over the last few days has specifically honed in on the largest swing state in the nation, Pennsylvania, to claim, without evidence, that “cheating” is already taking place in the state.

The former president this week has pointed to two Pennsylvania counties in particular, Lancaster and York, asserting that they are receiving thousands of fake ballots and fraudulent applications. The claims, however, misrepresent what officials in the county have said about the situation. 

Lancaster County District Attorney Heather Adams, an elected Republican, said election workers raised concerns about two sets of voter registration applications because of what she described as numerous similarities. They’re examining a total of about 2,500 forms while another county, Monroe, said it identified about 30 irregular forms and referred them to the district attorney’s office.

In York County, meanwhile, local officials confirmed that the county was reviewing suspect forms received from a third-party organization, adding that if a review comes across suspected fraud, the district attorney will investigate.

Separately this week, the GOP also successfully sued to extend a deadline in Bucks County to apply for an early mail ballot by three days. Long lines on the final day of that particular in-person voting option in the suburban Philadelphia county led to complaints voters were being disenfranchised by an unprepared election office.

“This is a direct violation of Pennsylvanians’ rights to cast their ballot — and all voters have a right to STAY in line,” the Trump campaign said in a statement.

“That's the system working just as it should,” a Harris campaign official said of the two instances. “All of this is cheating only in the mind of someone who wants to claim he was cheated, and it's yet another example of how Donald Trump tries to sow doubt in our elections and institutions when he's afraid he can't win.”

In the wake of the 2020 election, the Trump campaign and its allies had dozens of lawsuits challenging the results dismissed in courts across the country. The former president has not acknowledged he lost the contest to President Joe Biden and is facing federal charges for allegedly scheming to overturn the results. There is no evidence of widespread voter fraud in the 2020 election, which officials in both parties, including Trump's own Attorney General William Barr, have acknowledged. 

Officials for Harris’ campaign on Thursday pledged that they are “prepared for anything Trump and MAGA Republicans throw at us” this year, noting the team has lawyers deployed “24/7” who will seek to protect voters at the polls and in the courtroom. 

“In 2020, we beat their claims of fraud in court 60 times, and we're going to do it again in 2024,” an official said. “We've, in fact, already been building a steady record against his lies.” 

It comes after Harris on Wednesday said she believes Trump is “capable of anything” in terms of seeking to interfere with the results of next month's election, citing his actions around the Jan. 6, 2021, attack on the U.S. Capitol. 

"I think he is capable of anything, as proven by what he did on Jan. 6," Harris told ABC News in a brief interview while on the campaign trail on Wednesday when asked if she is concerned Trump will try to interfere with the certification of results. 

At the same time, she told ABC News that her team is “prepared to respond” should the former president seek to “manipulate the consensus of the American people.”

"We are, sadly, ready," Harris said, if Trump challenges the results. "And if we know that he is manipulating the press and attempting to manipulate the consensus of the American people based on fiction instead of facts, we're prepared to respond."

The former president has called Jan. 6, 2021, in which some of his supporters stormed the Capitol to interrupt the certification of Biden's win, a “beautiful day" and a "day of love."

In the closing days of her campaign, Harris has leaned into highlighting her opponent's actions on Jan. 6 and comments from some of his former staffers – such as his longest-serving chief of staff John Kelly, who recently said Trump fits the definition of a fascist – to paint the former president as a danger to democracy. (Trump has rebuffed Kelly's allegations and called him a "lowlife," among other things.)

Meanwhile, Harris campaign officials on the call pointed to early voting data to make the case that they are “feeling really good” about the vice president’s chances next week. 

“On both fronts, both on mobilization and turnout and on persuasion, we're feeling very, very good and feeling like we are encountering growing enthusiasm and momentum,” an official said, before acknowledging that they expect the race to remain very close until the end. 

Ian Sams, a spokesperson for the Harris Campaign, told Spectrum News this week that the campaign will be honing in on both mobilizing supporters to the polls and persuading those on the fence in the final days of the election cycle. 

“Across the battleground states in the coming days, we're going to be doing both of those things – trying to turn out voters, but also continuing to try to convince voters who may not have made up their mind yet that she's the right candidate for them.”

He also echoed the belief that the race is razor thin while expressing optimism about the results. 

“Usually by this point in the campaign, certain states have fallen off the board, so to speak,” he said. “But in this race, all seven states are neck and neck and we feel really good that we have the momentum.”

Officials on the call on Thursday also particularly noted high turnout figures thus far, something they argued benefits Harris. 

“We always believe and we know that we benefit from high turnout,” an official said. 

More than 60,000 people have already cast a ballot in this year’s election, according to data compiled by the University of Florida’s Election Lab.

The Associated Press contributed to this report.