High-profile Trump supporter Elon Musk denied working illegally in the United States, responding to President Joe Biden citing a Washington Post report that he might have worked in the country without appropriate work authorization earlier in his career in the 1990s.

"I was in fact allowed to work in the US. The Biden puppet is lying," Musk wrote on X, responding to a video clip of Biden criticizing Musk for working illegally when he was supposed to be studying.

The Washington Post reporting comes as Musk continues to bash undocumented immigrants and stress the importance of "legal immigration."

In 2013, Musk and his brother Kimbal Musk publicly talked about their experiences as founders of their company, describing their status as "illegal" and "grey area."

"In fact, when they, when they did fund us, they realized that we were illegal immigrants," Kimbal Musk said during the Milken Institute Global Conference.

"Well…" Elon Musk said.

"Yes, we were," Kimbal Musk responded.

"I'd say it was a gray area," Elon Musk said.

"Yes, we were," Kimbal Musk continued. "I was -- we were illegal immigrants. We were sleeping in the office. We didn't have a car -- we had one car, but the wheel kept falling."

The Washington Post story details Musk's alleged history of coming to the United States in the mid 1990s under a student visa and not actually enrolling in any classes -- instead using his time in the country to work on his startup company, which experts told the Post was illegal.

The article cites Musk's former business associates and investors of his startup expressing concerns about his visa status at the time, to the point that it had become an obstacle to going public with the startup company.

-ABC News’ Soorin Kim and Michelle Stoddart

HENDERSON, Nev. -- Harris vice presidential nominee Minnesota Gov. Tim Walz likened Trump's rally later today at Madison Square Garden to the Nazi rally held there in the 1930s ahead of World War II.

Speaking at a reproductive freedom bus tour kickoff near Las Vegas, Walz warned the crowd that Trump and his campaign are aware of the parallel.

"Donald Trump has descended into madness over the last few weeks, and I think some of you don't miss on this -- Go do your Google on this," he said.

"Donald Trump's got this big rally going at Madison Square Garden. There's a direct parallel to a big rally that happened in the mid 1930s at Madison Square Garden and don't think that he doesn't know for one second exactly what they're doing there," he said.

In February 1939, The German American Bund -- a pro-Nazi organization for Americans of German descent -- held a rally at MSG with about 20,000 attendees.

Walz's statement comes after other high-profile Democrats have suggested this similarity, including 2016 Democratic presidential nominee Hillary Clinton.

"One other thing that you'll see next week… is Trump actually re-enacting the Madison Square Garden rally in 1939. I write about this in my book," Clinton told CNN on Thursday.

-ABC News' Isabella Murray

Speaking at a Philadelphia church Sunday morning, Harris sought, without naming her opponent, to describe the contrast voters face.

“What kind of country do we want to live in?” she asked congregants. “What kind of country do we want for our children and our grandchildren -- a country of chaos, faith, fear and hate, or a country of freedom, justice and compassion?”

Harris cited Scripture to discuss the “heavy” work required over the next nine days, and the “joy” that will follow.

“These next nine days will test us. They will demand everything we've got. But when I think about the days ahead and the God we serve, I am confident that his power will work through us because church, I know we were born for a time such as this, and I have faith he is going to carry us forward.

“And the road ahead won't be easy. It will require perseverance and hard work. But in times of uncertainty, Scripture reminds us, weeping may endure for a night, but joy cometh in the morning. The path may seem hard, the work may seem heavy, but joy cometh in the morning, and church morning is on its way,” she said.

The vice president delivered a unifying message, saying, “This moment in our nation has to be about so much more than partisan politics. It must be about the good work we can do together, about our fundamental values and about who we are as Americans and as people of faith here in Pennsylvania right now, each of us has an opportunity to make a difference.”

“In just nine days, we have the power to decide the fate of our nation for generations to come. And on this day, then on this beautiful Sunday morning, I am reminded that God expects us to help him. We got work to do,” Harris said.

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

Trump's vice presidential nominee Sen. JD Vance was pressed on Sunday on Trump calling his domestic political opponents "the enemy from within."

In a recent Fox News interview, Trump referred to California Rep. Adam Schiff and former House Speaker Nancy Pelosi as "an enemy from within." Asked on NBC's "Meet the Press" if he believes Schiff and Pelosi are more dangerous than Russia and China, Vance tried to clarify what Trump said, telling Kristen Welker, "Those folks pose a greater threat to United States's peace and security.

"America is strong enough to stand up to any foreign adversary," Vance said.

Pressed if he agrees with Trump's comments, Vance said "that the biggest threat we have in our country, it's not a foreign adversary."

On CNN's "State of the Union," Vance insisted that Trump's "enemy from within" comments were not directed at political opponents.

CNN's Jake Tapper quoted Trump's previous statements to Vance, saying, "I'm talking about what he said publicly, he wants to use the military to go after the enemy within, which is the American people," Tapper said.

Vance fired back with, "He did not say that, Jake. He said 'far-left lunatics.' He's talking about people rioting after the election."

"He said about using the military that far-left lunatics, people who riot in the wake of an election, people who burned down American cities in the summer of 2020," Vance said. "Yes, we should have a federal law enforcement response."

-ABC News' Hannah Demissie