U.S. Senator JD Vance, Republican Donald Trump's pick as his vice presidential running mate, squared off against Minnesota Governor Tim Walz, who Democrat Kamala Harris tapped to be her No. 2, in a nationally televised debate on Tuesday.

The debate is likely the final one of the 2024 presidential campaign, potentially giving it some additional weight ahead of the Nov. 5 election.

Here are some takeaways from the event in New York:

BOB AND WEAVE AT THE OPENING BELL

The first question of the debate related to the ongoing conflict in the Middle East, asking both men if they would support a preemptive strike by Israel on Iran to disrupt the development of the latter's nuclear program.

Neither candidate was eager to answer.

A visibly nervous Walz dodged the question, pivoting to a critique of Trump's record during his four years in office.

"What's fundamental here is that steady leadership is going to matter," Walz said. "It's clear, and the world saw it on that debate stage a few weeks ago, a nearly 80-year-old Donald Trump talking about crowd sizes is not what we need in this moment."

Vance appeared to rib Walz for not addressing the question head on, but then segued into a description of his biography.

"My mother required food assistance for periods of her life," said Vance, who grew up in a working-class Ohio household.

Vance did eventually circle back to the question, saying a second Trump administration would support Israel's decision on the matter. But not before he offered an extended defense of Trump's foreign policy, characterizing his time in office as extraordinarily peaceful.

In the opening exchange, at least, the candidates were less eager to dive into policy details than they were in litigating Trump's legacy and introducing themselves to Americans.

MAGA SMOOTHIE

The Vance on stage was the one the Trump campaign had in mind when Trump selected him as his No. 2 in July.

The idea then was that the 40-year-old first-term senator and best-selling author could serve as an articulate and rational voice for Trump’s Make American Great Again movement as well as perhaps one day become a generational torchbearer.

But instead Vance had a rocky roll-out on the campaign trail, sometimes becoming the target of online scorn and mockery while most often serving as Trump’s attack dog. The headlines were mostly negative, and his approval ratings suffered.

On Tuesday, Vance was affable, cordial and composed, even occasionally complimentary toward Walz (if not Harris).

He spoke about making the American dream “attainable once again." He deftly answered a question on climate change by making an argument for increased U.S. energy production. He detailed the basis for Trump’s aggressive protectionist trade policies, saying the experts were “wrong” that increased foreign trade would boost the U.S. middle class.

In doing so, Vance seemed to be succeeding at a vice presidential running mate's primary task: Making the candidate at the top of the ticket more palatable to the viewers at home -- no easy job when it comes to Trump.

It was clear as the evening progressed, that was the goal of the Trump campaign in this debate, not trying to smear Walz. As one strategist said before the debate, people don't vote for the vice presidential nominee.

THE 'HARRIS ADMINISTRATION'

Joe Biden has been president of the U.S. for almost four years, but you would never have known that listening to Vance. And that was by design.

Early in the debate, Vance continually implied that Harris, as vice president, has been a primary decision maker in the White House on issues such as immigration and the war in Gaza. At one point, Vance referred to the “administration of Kamala Harris” and later he referred to when Harris “came into office.”

It is a strategy the Trump campaign has long employed on the campaign trail — an attempt to make Harris inherit Biden’s political liabilities. In his debate with Harris, Trump largely failed to make that connection for viewers at home. But at rallies since then, he has repeatedly suggested that Harris has had more than three years to fix the nation’s problems.

Vance said something similar in a debate answer on the economy. "If Kamala Harris has such great plans for how to address middle class problems, then she ought to do them now,” he said.

It is a tactic that has not completely borne fruit, however. Opinion polls have shown that voters largely do not blame Harris for Biden’s economic and immigration policies, allowing her to cut into Trump’s advantages on those issues.

ROUGH PATCHES

Both Walz and Vance tried to explain away past statements that undercut their credibility.

For Walz, it was media reports this week that he was not in Hong Kong in June 1989 during the deadly uprising at Tiananmen Square in China, despite having said several times he was there on a teaching trip. In fact, Walz was in Nebraska at the time and did not travel to Hong Kong until August of that year.

Asked about the misleading claim, Walz delivered a meandering answer about growing up in a small town and being elected to Congress.

“I’ve not been perfect, and I’m a knucklehead at times,” Walz said.

Walz, a former high school football coach, may have been trying to run down the clock. Finally, when pressed by the CBS News moderator, he said, “I got there that summer and misspoke on this.”

Vance was again asked to reconcile his past criticism of Trump, including comparing him to Adolf Hitler, with his current position as No. 2 on the Republican ticket.

“I was wrong about Donald Trump,” Vance said, adding Trump “delivered for the American people” on a lot of things “that I didn’t think he’d be able to deliver on.”