We Watched Tim Walz’s Old Debates. Here’s What We Learned.

Before he was known to the nation as an affable Midwestern dad and a vice-presidential nominee, Tim Walz was a fast-talking political long shot in an ill-fitting suit, spoiling, in his Minnesotan way, for a debate-stage fight.

As he stood next to his opponent — a crisply dressed six-term Republican congressman — Mr. Walz, a teacher by training, offered viewers a stark contrast at that 2006 debate, hosted by KSMQ-TV. Mr. Walz cast their choice as one between a political insider focused on “moving up in elected office” and the alternative he said he represented: “I live in the world that most of you live in.”

Nearly two decades later, Mr. Walz is the one who has moved up in elected office, rising from congressman to governor and now, Vice President Kamala Harris’s running mate. He is set to face Senator JD Vance of Ohio, former President Donald J. Trump’s running mate, in a high-profile debate on Tuesday.

Mr. Walz and his allies have tried to set expectations high for Mr. Vance, emphasizing his Yale Law School credentials. And Mr. Vance is a practiced verbal pugilist who seems to delight in combative exchanges on cable news and Sunday morning shows.

But a review of a half-dozen recorded debates over Mr. Walz’s career makes clear that while the camo-wearing, car-tinkering man from Mankato may not be his party’s most stirring speaker, he is in fact a seasoned debater himself.