The matchup could have an impact on critical undecided voters.

Vice presidential candidates Gov. Tim Walz and Sen. JD Vance squared off for the first and only time this election season.
Unlike the last two presidential debates, the candidates appeared to be more cordial. However, both running mates criticized the presidential candidates on a host of issues including gun violence, reproductive rights, immigration and climate change.
Walz appeared to have nerves in the opening of debate, but went on the attack as the night went on. Vance took aim at Harris and her policies and pushed Trump's policies.

FACT CHECKS OF THE DEBATE | Vice presidential debate fact check: Claims made by Gov. Tim Walz and Sen. JD Vance

Following the debate, President Joe Biden said Walz proved he "has what it takes" to be the vice president.
"Trust me, I know what a good vice president looks like," Biden wrote on X. "Tonight's debate made it clear my friend @Tim_Walz has what it takes."
Former President Donald Trump said his running mate "crushed it" on his social media platform, and his campaign said Vance "perfectly articulated" the case for a second Trump administration.

Vance ended the night with a closing statement focusing on Harris' policies.
The senator blamed Harris' policies for higher energy costs, housing costs and other goods.
"We need change. We need a new direction. We need a president who has already done this once before and did it well," he said.