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.

Washington, D.C., officials say they have no credible threats to the city, however, they will be fully activating police and have received support from Virginia and Maryland law enforcement agencies.

"I feel very strong about the district's preparation," Mayor Muriel Bowser said Monday. "I feel very sad that this is the state of things to be honest with you, but the way that I deal with anxiety is to work and to make sure that we are as prepared as we can be, and that people, all people, win or lose, do the right thing."

D.C. police will have increased patrols in key areas downtown and around the White House, Police Chief Pam Smith told reporters Monday.

"[The] proactive presence is a preventive measure, and while there is no credible threat to the District of Columbia, we want residents and visitors alike to feel sure that MPD is here prepared and dedicated to keep communities safe across all seven districts.," Smith said.

The mayor said before Jan. 6 and the inauguration she expects to make a National Guard request for additional assistance, but no request will be made for election week.

-ABC News' Beatrice Peterson

Philadelphia Judge Angelo Foglietta said he plans to issue a decision "shortly" after a nearly six-hour hearing over Elon Musk's America PAC's million-dollar giveaway, as Philadelphia District Attorney Larry Krasner is seeking an emergency injunction to stop the sweepstakes.

During closing arguments, a lawyer for Krasner called Musk's giveaway "one of the great scams of the last 50 years" by deceiving more than a million swing state voters to sign a petition in the hopes of winning a million dollars.

"There is nothing random about that process,” the lawyer, John Summers, said. "This was a profound, devastating and widespread deception."

Summers argued that Musk attempted to "influence the election" by encouraging hundreds of thousands of voters to sign a petition while preselecting the winners based on their "suitability" to serve as spokespeople for the political action committee. Summers argued that even if the lottery was not random, it's still illegal under Pennsylvania law.

"They essentially advertised this as a lottery. It’s not a defense that what we said it was isn't true," Summers said.

Andy Taylor, a lawyer for Musk’s America PAC, argued that the DA’s case falls apart after today's revelation that the alleged lottery awarded preselected winners.

"It's an opportunity to earn. It's not a chance to win," Taylor said, emphasizing the winners' roles as spokespeople for the PAC.

Taylor emphasized that the case centers on a petition in support of the First and Second amendments, arguing that shutting down the giveaway would infringe on free speech.

"You are going to smother in the crib the rights of millions of Pennsylvanians from exercising constitutional magnitude free speech," Taylor said.

Speaking outside court, Krasner’s attorney declined to comment on the specifics of the case, simply acknowledging, "It's in the hands of the judge."

-ABC News' Peter Charalambous

The Cybersecurity and Infrastructure Security Agency continues to see threats towards election officials a day before Election Day, according to a top official for CISA, the cyber arm of the Department of Homeland Security.

In a call to reporters Monday, Cait Conley, who is in charge of CISA's election security portfolio, called these threats "fundamentally un-American."

CISA Director Jen Easterly said most local elections officials are in touch with law enforcement.

"We've not seen specific reporting about violence at polling places, so I certainly don't want voters to feel at all intimidated about going to voting locations," Easterly said, saying it should "really be a day of celebration."

Easterly said they "expect" disruptions throughout Election Day, and they are prepared for it. Foreign adversaries -- particularly Russia, China and Iran -- are looking to "undermine American confidence and the legitimacy of our elections and to stoke partisan discord," she said.

-ABC News' Luke Barr