Several Harris supporters at her rally in battleground Michigan on Sunday told ABC News they were confident in Harris’ prospects because they knew Republicans in their community who are casting a ballot for Harris -- many of them secretly.

Andrea Galindo said she believes Harris will win “because I know a lot of Republicans voted Democrat.”

Mike Arvizu said his father is a lifelong Republican who is voting for Harris.

“If my father-in-law can do it, there’s a lot more people out there,” Arvizu said.

Their optimism reflects a defining strategy of the Harris campaign: to reach every possible voter in battlegrounds, including Republicans and independents. In her final rally speeches, the vice president is stressing that she would invite those who disagree with her to have a seat at the table.

But voters said that the toxic and divisive nature of politics today means that many of these Republicans aren’t openly saying that they’re backing Harris.

“We’ve become so divided in this country that people don’t even have Thanksgiving with their own family members anymore. I think there is a fear in this country about even talking about politics, especially if you don’t know if someone agrees with you,” said Curtis Hertel, who is running for Congress in Michigan.

But Hertel said he’s seeing more conversation now across party lines, with Harris canvassers making headway even in deep-red areas like Livingston County.

-ABC News Senior White House Correspondent Selina Wang

On the eve of Election Day, the head of elections in the battleground state of North Carolina has issued an on-camera plea to candidates on the ballot tomorrow: "I would just make a plea to the candidates and elected officials: Have a peaceful transition of power. Accept the results. Concede defeat when necessary," Karen Brinson Bell, the executive director of the state’s board of elections, said during a press conference Monday.

While saying that "there’s more hostility" this election, she also urged candidates, voters and others to "please recognize" that election workers are "members of this community" who have "sworn oaths ... [as part of] a bipartisan effort to ensure that every eligible voter is able to cast their ballot, and that these results are tabulated and determined securely, accurately and correctly."

"Please treat others with dignity and respect," she said, adding that state and federal law forbids people from trying to intimidate voters or interfere with election officials carrying out there duties -- and the penalties can include prison time or fines, or both.

-ABC News' Mike Levine

Tim Walz called on voters in battleground Wisconsin to vote for an "optimistic" future during a rally in La Crosse.

"This election could be won, quite literally, through the state of Wisconsin, and it could be won right here through La Crosse," Harris' running mate said. "That's how close this thing could be. So we're taking nothing for granted."

Walz addressed policies he and Harris will focus on, including working to lower the cost of living for middle class Americans, addressing price gouging on groceries and making reproductive rights enshrined into law.

He said they have an opportunity to vote for "a future that either goes backwards -- is divisive, dark and angry -- or one that is hopeful, unified, inclusive."

"Swifties for Kamala," the grassroots organization of Taylor Swift fans working to elect former Vice President Kamala Harris, announced over the weekend they had sent over 250,000 mailers to Pennsylvania voters encouraging them to pledge their support to Harris, make a voting plan and encourage their friends to do the same.

Included in 50,000 of the mailers were friendship bracelets beaded with the words "voting era," a reference to the bracelets fans trade at Swift's Eras Tour.

"Every vote in this election matters, especially in Pennsylvania, which could be the state that makes the planets and the fates and all the stars align for VP Harris," the mailers read. "We think you belong in the voting booth because we are never going back, like ever.”

-ABC News' Brittany Shepherd