Election security updates: Voting hours extended in Pennsylvania county

Michelle Obama went on social media to share a “message to all the young people out there,” encouraging them to vote for Vice President Kamala Harris as the next president of the United States.

“Look, I know it’s easy to feel what we do doesn’t matter. Like the world’s problems are too big and complicated to tackle. Like nothing’s ever going to change at all," she said in a video, pointing to contentious issues like reproductive health rights and climate change.

"That’s exactly why you have to vote: because we need a better leader than Donald Trump. We simply cannot afford another four years of his incompetence, weakness, and division," she added.

The former first lady goes on to say that Harris is the opposite — suggesting that the Democratic presidential candidate will "expand your freedoms" and "protect the planet."

"While he denigrates anyone who is different than him, while he looks out only for himself, Kamala will be a president for all Americans. I know she will listen to you. And that’s why you have to vote for Kamala Harris and Tim Walz on November the 5th,” she said, before urging young people to make a plan to vote on Election Day.

Watch the full video on X.

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

In what campaign aides are classifying as his "closing message" speech, former President Donald Trump is already setting expectations for his supporters to challenge the results of the election, saying Vice President Kamala Harris only has a 4% chance of winning the race.

"So based on what I'm hearing -- she's at 4%. And so we never want to take anything for granted. But we're really doing well," Trump said during his rally in Pittsburgh, Pennsylvania.

Trump again falsely accused Democrats of cheating in the 2024 election, but added that it's "too big to rig."

“I do believe it is too big to rig. They'll try. And they are trying, you know, though. It's too big to rig. This is a big movement," Trump said.

Doubting the fact that President Joe Biden legitimately won the 2020 Election, Trump said that he has since learned.

"This is that big, powerful, vicious party -- that's a vicious machine. They can take all these bad ideas and win elections." he said.

The comments come as the Trump campaign has 230,000 poll observers along with 500 attorneys in every battleground state.

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

Vice President Kamala Harris made two stops at residents’ homes in Reading, Pennsylvania, and asked for their votes.

At the first stop, Harris greeted a family and followed them to their door so that she could talk to them.

At the second stop, Harris rang the doorbell and surprised the residents, a couple. She hugged the woman who answered the door.

“You know, it’s the day before the election, and I just wanted to come by and say I hope to earn your vote and wanted to just thank you for just giving us the time for this conversation,” Harris told the couple, before they conversed together briefly on one of her recurring campaign messages: finding common ground.

The woman said that Harris had received her vote already, and that she would be working the polls on Tuesday, while her husband would be voting on Election Day.

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

Former Democratic presidential candidate Marianne Williamson said she cast her vote for Vice President Kamala Harris while emphasizing that no matter who wins, she will do "whatever I can to further the ideal that ultimately love will win."

"No matter who wins, the result is going to be heartrending to roughly half the country. I feel like I want to put my arms around millions of people and tell them it’s going to be OK. I voted for Kamala," she said, in part, in a statement posted to X.

-ABC News' Brittany Shepherd