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

Vice President Kamala Harris continued her Monday swing through Pennsylvania with a rally targeted in large part at Puerto Rican voters in Allentown, a majority-Latino city, where the Harris campaign sees an opportunity to woo voters turned off by the racist joke Tony Hinchcliffe told at former President Donald Trump’s New York rally last month.

When Mayor Matthew Tuerk mentioned Hinchcliffe's "garbage" comment, the crowd at the Muhlenberg College gymnasium booed, and at least two Puerto Rican flags were unfurled.

Rapper Fat Joe, who spoke shortly before Harris, called upon Latino voters to have "pride" and reject Trump.

"They said they needed a Puerto Rican in Allentown, and I was more than honored to come speak to my people," he said.

In her own remarks, the vice president touted her "long-standing commitment to Puerto Rico and her people."

She promised that she would be "a president for all Americans" and added that her campaign has "momentum" in the closing hours of the race.

"It is my pledge to you, if you give me a chance to fight on your behalf as president, there is nothing in the world that will stand in my way," Harris said.

-ABC News' Will McDuffie, Gabriella Abdul-Hakim and Fritz Farrow

Following a six-hour hearing on Monday, a Philadelphia judge is allowing Elon Musk's America PAC to continue its million-dollar giveaway to registered swing state voters.

Common Pleas Court Judge Angelo Foglietta denied Philadelphia District Attorney Larry Krasner's request for an injunction to stop the giveaway, which has handed out $17 million to voters across the swing states. According to defense attorneys, America PAC plans to announce their 18th and final prize winner tomorrow in Michigan.

In a win for the Republican National Committee, the Georgia Supreme Court on Monday ruled that thousands of voters whose mail-in ballots were delayed will not have extra time to send them back.

The ruling from the court reversed a lower judge's ruling that had granted 3,000 voters an extension of the mail-in-ballot deadline, after Cobb County election officials admitted they missed the deadline to ship them out.

The deadline for mail-in ballots to be received in Georgia is Election Day -- but the lower judge had given those voters an extension for them to be postmarked by election day and received by Nov. 8, the same deadline for overseas ballots.

The RNC had appealed the ruling, saying it was a violation of the election code and that voters still had other ways they could vote, including in person.

The Georgia Supreme Court ordered the Cobb board to "keep separate" the absentee ballots of those voters that are received after the deadline on Election Day but before Nov. 8 "in a secure, safe, and sealed container separate from other voted ballots."

Cobb County had previously been ordered to ship out all of the delayed ballots by Nov. 1 with express shipping and overnight return envelopes.

The court also ordered the board to notify the voters by email, text or public announcement of the change.

-ABC News' Olivia Rubin

At a rally in Reading, Pennsylvania, on Monday, Trump called on residents to turn out and vote tomorrow.

"If we win Pennsylvania, we win the whole ball of wax," he said. "It's over. It's over."

"We're just one day away. Oh, we've been waiting for this. I've been waiting four years for this," he said.