VP debate highlights: The biggest moments from JD Vance's and Tim Walz's first and only faceoff

• Tim Walz and JD Vance are debating on Tuesday night for the first and only time.
• It's likely to be the last faceoff of the 2024 election. Trump has refused to debate Harris again.

Sen. JD Vance of Ohio and Gov. Tim Walz of Minnesota met on Tuesday night for the first and only vice presidential debate.

It's the third general election debate of the 2024 campaign, following the June 27 debate that triggered President Joe Biden's eventual dropping out of the race and the September debate between Vice President Kamala Harris and former President Donald Trump.

It's likely to be the last of the 2024 campaign. Trump has refused to debate Harris again.

Tuesday night's faceoff represents an opportunity for both Walz and Vance to introduce themselves to their biggest audience yet while reinforcing their respective running mates' campaign messages.

Here's how to watch the debate — and here are the biggest takeaways so far.

Vance appeared more polished than Walz out of the gate

The first question of the debate was about the Middle East in light of an Iranian missile attack on Israel earlier on Tuesday. Both men were asked whether they would support a preemptive Israeli strike on Iran.

Walz appeared to stumble over his words at first as he affirmed Democrats' standard line on Israel — that they support the Jewish state's right to defend itself while acknowledging the humanitarian suffering in Gaza.

At one point, the Minnesota governor declared that the "expansion of Israel and its proxies is a absolute fundamental necessity for the United States," seemingly confusing Israel with Iran, a country whose proxies include Hamas and Hezbollah.

Walz then pivoted to attacking Trump, saying that "a nearly 80-year-old Donald Trump talking about crowd sizes is not what we need in this moment." He did not directly address the question about an Israeli strike.

Vance, on the other hand, started with his biography. "I recognize a lot of Americans don't know who either one of us are," he said, recounting the life story that he first detailed in his memoir "Hillbilly Elegy."

The Ohio senator later addressed the question by saying that he would support an Israeli strike if that's what Israel decided to do, saying the country should do "what they think they need to do to keep their country safe." He also argued that Trump kept the world safe by "establishing effective deterrence" and that "people were afraid of stepping out of line."