YORK, Pa. — The day after their vice presidential debate in New York City, Republican Sen. JD Vance of Ohio and Democratic Gov. Tim Walz of Minnesota jumped back on the campaign trail with stops in two crucial battleground states.

As he arrived at the airport near Harrisburg, Pennsylvania, Wednesday, Walz pointed toward his debate hours earlier with Vance and told reporters, ‘New York City was a little crazy last night.’

Most pundits said Vance was the more polished of the two candidates on the vice presidential debate stage Tuesday night, although flash polls indicated debate watchers were mostly divided on which running mate was victorious.

An accidental response by Walz during the debate quickly went viral, as Vice President Kamala Harris’ running mate mistakenly said he had ‘become friends with school shooters.’ 

The mishap occurred when Walz was asked about changing positions on banning assault weapons, which he previously opposed but now supports. 

‘I sat in that office with those Sandy Hook parents. I’ve become friends with school shooters. I’ve seen it,’ Walz said.

Asked to clarify his debate gaffe, Walz said Wednesday, ‘I’m super passionate about this. The question came up about the school shooting. We’re talking about everything except school shootings. And I sat as a member of Congress with the Sandy Hook parents, and it was a profound movement.

‘David Hogg [a leading gun control activist and school shooting survivor] is a good friend of mine.’

Walz acknowledged ‘I need to be more specific on that. But I am passionate about this.’

Vance, speaking at a rally in Auburn Hills, Michigan, said he didn’t hear Walz’s comment until he was told about it during a conversation with his running mate, former President Trump, after the debate.

‘He said that Tim Walz said that he was friends with school shooters twice,’ Vance said, referencing his conversation with Trump. ‘And that’s something I actually didn’t notice that Tim Walz had said that on the debate stage.

‘I said, ‘Did he really say that, sir?’ And he [Trump] said, ‘I’m telling you, man, go and watch the clips.’

‘And I said that was probably only the third or fourth-dumbest comment Tim Walz made that night.’

The debate moderators also confronted Walz on his claim to have been in Hong Kong during the 1989 Tiananmen Square massacre in Beijing, China.

Walz admitted he traveled to Asia in August 1989, several months after the April 15 massacre, adding he can be ‘a knucklehead at times.’

The governor on Wednesday reiterated that he had his ‘dates wrong.’

Trump, in an interview Wednesday with Fox News’ Brooke Singman, called his running mate’s performance ‘fantastic’ and that it had ‘reconfirmed my choice.’ 

The former president also argued that Walz had ’embarrassed himself’ during the debate.

Another major moment in the debate came near the end, when Vance wouldn’t say that President Biden won the 2020 election over Trump. The former president for four years has repeatedly made unproven claims that the election was rigged and rampant with voter fraud.

Walz, on Wednesday, once again emphasized that ‘it is disqualifying to not acknowledge that the 2020 election was won by Joe Biden. It’s as simple as that.’

An hour later, speaking to a large crowd at a rally at the York Fairgrounds, Walz charged that ‘you can’t rewrite history. And trying to mislead us about Donald Trump’s record. That’s gaslighting.’

Vance, asked about his avoidance of answering the 2020 election question during the debate, reiterated his charge on Wednesday that ‘the simple reason’ is that ‘the media is obsessed with talking about the election of four years ago. I’m focused on the election of 33 days from now because I want to throw Kamala Harris out of office and get back to commonsense, economic policies.’

Walz arrived at his rally in York to cheers as he pulled into the York Exposition Center riding his campaign bus.

But York is Trump country. The former president won York County by roughly 25 points over Biden in 2020.

Walz’s Pennsylvania swing through Harrisburg, York and Reading kicked off what the Harris campaign described as a more aggressive post-debate travel and voter engagement blitz by the governor, with stops in two other battleground states — Arizona and Nevada — and a fundraising blitz in Ohio, California and Washington

And the campaign noted that Walz would participate in more media interviews. Vance has done dozens of interviews and repeatedly fielded questions from reporters on the campaign trail since Trump named the senator as his running mate 2½ months ago.

Vance made the first of his two stops in Michigan in Auburn Hills, at Visioneering, an automotive industry tool supplier.

Auburn Hills is in Oakland County, which has swung heavily toward the Democrats in recent election cycles. Biden carried the county by roughly 14 points over Trump four years ago.

Michigan and Pennsylvania are two of seven key battleground states whose razor-thin margins decided Biden’s 2020 victory over Trump and will likely determine whether Trump or Harris win the 2024 presidential election.

Fox News’ Deirdre Heavey and Kirill Clark contributed to this report