Walz-Vance debate updates: VP candidates tangle on abortion, immigration and Jan. 6

Walz said Trump has called climate change a hoax and then "joked that these things would make more beachfront property to be able to invest in."

In referencing those remarks, the moderator asked Vance if he agreed. Vance did not directly answer, instead responding that Trump has said that if Democrats believed that climate change is serious, they would be increasing energy production in the U.S. "and that's not what they're doing."

He also said Democrats use clean energy as a "slogan."

Vance often evokes his personal connections to Appalachia, as he did just now talking about Hurricane Helene's devastation of the region. But there's more than a bit of controversy over this. While his grandparents were from Southeastern Kentucky, Vance himself grew up in Middletown, Ohio, as was the subject of his memoir, "Hillbilly Elegy: A Memoir of a Family and Culture in Crisis." Middletown itself is a small city of about 50,000 between Cincinnati and Dayton, far from Appalachia.

For his part, Walz was born in a small town in Nebraska — West Point, a town of about 3,500 — and has spent most of his career representing or living in the Midwest.

—538's Monica Potts

In response to Vance's criticism of Harris' immigration policy, Walz brought up the fact that Congress had a plan to address the migrant issue before Trump pushed Republicans to drop their support.

"Pass the bill, she'll sign it," Walz said.

Fact Check: True

Vance has shifted his view toward President Trump since he first rose to prominence. Early in his career, Vance made a number of comments that were disparaging toward Trump. The specific comment that Walz seems to be referencing here is from a 2016 New York Times op-ed written by Vance ahead of the release of his book “Hillbilly Elegy." In the op-ed, Vance wrote that “Mr. Trump is unfit for our nation’s highest office.” In years since the op-ed was published, Vance has said his views on Trump changed.

—Allison Pecorin