Trump says he 'shouldn't have left' the White House

Minnesota Gov. Tim Walz and second gentleman Doug Emhoff held their first joint event of the campaign cycle on Sunday, just two days out from Election Day in Gwinnett County, Georgia -- critical ground for Vice President Kamala Harris as she attempts to win the presidency on Tuesday.

The event also featured Harris' sister, Maya, and musical performances by Jon Bon Jovi, The War and Treaty and Michael Stipe. It was a high-energy affair, and when Walz asked who had already voted in the room of about 1,400 people, nearly every hand went up -- an anecdote consistent with the record early voting numbers Georgia has been reporting.

"Here's the deal, Georgia, you have the potential to win this whole damn thing," Walz said.

Walz also warned the crowd that GOP House Speaker Mike Johnson had said Republicans might seek to repeal the CHIPS and Science Act if they take control of Congress this cycle.

"Listen to this -- defunding 115,000 jobs that are already working in manufacturing and construction, including 1,200 good paying jobs right here in Georgia," Walz said. "This thing is not only important for jobs, it is critical that we win the competition of the 21st century from countries like China."

-ABC News' Isabella Murray

The Republican National Committee on Sunday filed a federal lawsuit taking aim at some Georgia counties that are allowing voters to drop off their mail-in ballots in person in the run-up to Tuesday's election -- a move Republicans say is illegal because the early voting period has ended, according to the filing.

Republicans have asked a judge to block these counties from accepting mail-in ballots from voters over the weekend and on Monday, saying the practice amounts to an "unlawful extension" of the voting deadlines.

A similar lawsuit filed by Republicans targeting just Fulton County over the same issue was already rejected by a Georgia judge, as ABC previously reported.

Early voting in the state ended on Friday.

The lawsuit Sunday targets seven counties in the state: Fulton County, DeKalb County, Cobb County, Gwinnett County, Chatham County, Clayton County and Clarke County.

The RNC claims, in part, that voters located in other counties where offices aren't open this weekend are being "denied equal protection" because they allegedly have fewer days and opportunities to drop off their ballots.

-ABC News' Olivia Rubin

Former football star and unsuccessful Republican senate candidate Herschel Walker is expected to speak at former President Donald Trump’s rally in Macon, Georgia, on Sunday night, sources tell ABC News.

During his senate candidacy, Walker was embroiled in controversy as he faced multiple allegations that he paid for women’s abortions in 1993 and 2009, despite holding an anti-abortion position.

Since his loss, Walker has retreated from the political spotlight, re-enrolling in the University of Georgia, but was recently seen hanging out with Trump when the former president attended the Alabama-Georgia football game in September.

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

In Milwaukee, Wisconsin, on Sunday, -- last day of early voting in the state -- former President Barack Obama continued to pitch Vice President Kamala Harris to undecided voters, while blasting former President Trump and addressing recent discourse about the Affordable Care Act.

"So in these last three days, I hope you are talking to people who are still undecided. I hope the conversation isn't just about policy," Obama implored the energetic crowd during his rally Sunday afternoon in Milwaukee, emphasizing the importance of values and a "moral compass" in this election.

"One of the most disturbing things about this election -- not just this election, but Trump's entire rise in politics, you can see it just pervading our political culture -- is how we seem to have just set aside those values that we were taught," Obama said.

Obama also jumped to defend the Affordable Care Act that was enacted during his presidency, also known as Obamacare, following recent suggestions that the Republican ticket would conduct "massive reform" of the healthcare act.

“If you ask Donald Trump what he's going to do to make healthcare more affordable, he's got one answer, and that is to repeal the Affordable Care Act," Obama said. "And he's not by himself. The other day, the Speaker of the House, the Republican Speaker of the House, Mike Johnson, said there would be 'no Obamacare,' if Trump wins."

Obama also continued to make jabs at Trump throughout his speech, saying he got rich because he was "given $400 million by his daddy," claiming he would call his chauffeur rather than changing his own tire, and mocking Trump's infamous "concepts of a plan" line.

-ABC News' Emily Chang