Rep. Jeff Flake is the second Arizona Republican in a month to deliver the GOP's weekly address.
The move appears to be an effort to boost Flake's Senate campaign and to present a national face of fiscal conservatism.
"My wife, Cheryl, and I celebrated some great news this week. We became grandparents for the first time. Aiden Jeffrey Flake was lucky enough to be born in the greatest country in the world," he said. "While it will be years before he is ready to start school, his share of the national debt is already over $50,000.
"If we continue along our current budget trajectory, our grandson is simply not going to have the same opportunities that my grandparents created for me," said Flake, who has used this personal story previously in the campaign.
He is locked in a Tossup race against former Surgeon General Richard Carmona. This is an open seat created by Sen. Jon Kyl's (R) retirement.
Flake's fellow Arizonan, House candidate Vernon Parker, delivered the GOP address in late September. He is in a Tossup race against former state Sen. Kyrsten Sinema (D) in Arizona's 9th district.