SELINA WANG: New rivals Vance and Walz, both veterans. Vance, who deployed to Iraq in the Marines and did not see any active fighting, going after Walz's military background, accusing him of leaving his unit before it deployed to Iraq, and lying about his service. Seizing on this moment:
TIM WALZ: And we can make sure those weapons of war that I carried in war is the only place where those weapons are at.
JD VANCE: He has not spent a day in a combat zone. What bothers me about Tim Walz is the stolen valor garbage. Do not pretend to be something that you're not.
WANG: Reporter: Walz served in the Army National Guard for 24 years and has never claimed to have seen active combat, despite those comments that he carried a gun in war. He retired honorably in 2005 to run for congress as the crisis in Iraq was growing. The Harris campaign saying in a statement, the Governor carried, fired, and trained others to use weapons of war innumerable times. Governor Walz would never insult or undermine any American's service to his country. In fact, he thanks Senator Vance for putting his life on the line for our country. It's the American way. Walz hitting right back.
WALZ: Donald Trump, he sees the world differently than we see it. He has no understanding of service.