Election security updates: Officials brace for Election Day under cloud of threats

Former President Donald Trump's final campaign rally in Grand Rapids, Michigan, saw the Republican presidential nominee urging supporters to head to the polls while also again casting doubt on the security of the electoral process.

Multiple times throughout Trump's speech he told supporters to go out to the polls "tomorrow." However, given the rally was happening after midnight, people in the crowd started yelling "today" and then Trump falsely said the election was happening on Wednesday.

"It sounds so much better when you say tomorrow, Wednesday," Trump said. "But that's okay. I want to be exactly accurate for them, but go out today and vote. And I guess seven o'clock or whatever, whatever time it is, doesn't matter, and we're going to have the greatest victory in the history of our country."

Trump then suggested that his supporters might be to blame if he does not defeat Vice President Kamala Harris.

"There's nothing they can do" if Republicans turn out, Trump said of his opponents. "In other words, to make you feel a little guilty, we would only have you to blame." Later, Trump claimed he has the "silent majority" and urged his supporters to "speak up."

The former president also again cast doubt on the security of voting machines, despite officials and experts confirming the security of the election system.

"Perhaps I will be president in less than 24 hours, or maybe it will take these machines that we pay so much for two weeks," Trump said, claiming that paper ballots would be cheaper, faster and more secure.

"What the hell is happening in the inside of those machines?" he continued. "If you wait, we want the answer tomorrow, tonight," Trump said, quickly correcting himself. "We want the answer tonight."

"You have to cheat," Trump said about Democrats. "Who the hell is going to approve that stuff? Who's going to prove open borders with criminals pouring into our country by the millions now they have to cheat. They have to cheat, and they do, and they do it very well, actually."

-ABC News' Lalee Ibssa, Soo Rin Kim and Kelsey Walsh

Minnesota Gov. Tim Walz spoke for less than five minutes during his final campaign rally of the 2024 presidential race -- focusing on reproductive rights.

The governor and his wife, Gwen, participated in the campaign's Election Eve festivities on Monday in the pivotal battleground state of Michigan following their blitz through Wisconsin.

"You could probably tell from these rallies, all across the country tonight, this team is running like everything's on the line -- because everything's on the line," Walz said in Detroit.

Addressing the "guys in the crowd" about reproductive rights, Walz said the issue "really underlines the stakes in this election."

"I want you to think about the women in your life that you love," he said. "Their lives are at stake in this election. Donald Trump appointed those Supreme Court justices who repealed Roe v. Wade, and he brags about it."

Vice President Kamala Harris, Walz said, would codify reproductive freedom if a bill came upon her desk as president.

"When Congress passes that bill to restore reproductive freedom, President Harris will sign it into law," Walz said.

"Kamala and I trust women, it's that simple. Now tomorrow, women all across America, of every age, both parties, are going to send a loud and clear message to Donald Trump, whether he likes it or not."

Walz ended his remarks by stressing the historical significance of Tuesday's election.

"There's going to be a day you're going to be sitting in that rocking chair, and you're going to be rocking on that porch," Walz said. "And a little one is going to come home from school and ask, what did you do in the 2024 election, where the American experiment survived, where the rule of law survived, where decency survived?"

Walz added, "And you're going to be able to answer: 'Every damn thing I could'."

-ABC News' Isabella Murray

The first six ballots of the 2024 presidential election have officially been counted in Dixville Notch, New Hampshire.

Of the six registered voters in the town, three votes were cast for Vice President Kamala Harris and three votes went to former President Donald Trump.

Vice President Kamala Harris' final campaign rally in the 2024 presidential election was a star-studded event outside of the Philadelphia Museum of Art on Monday.

Famed talk show host, Oprah Winfrey, joined Harris onstage where they aimed to motivate voters ahead of Election Day.

"One more day, just one more day in the most consequential election of our lifetime," Harris said. "And momentum is on our side."