The ad is a one-minute closer that intersperses clips from Carmona's stump speeches with clips of him chatting with supporters. Complementary news clips -- "bipartisan appeal," from the Arizona Daily Star; "A centrist force," from the American Prospect -- flash across the screen.

The spot ends with an extended clip from the speech President Clinton gave at a recent Carmona campaign event in Tempe, Ariz.

"I can't think of a person in America who is more needed at this moment in our history in the U.S. Senate," he says of Carmona.

The Arizona Senate race remains close in its final days, and Carmona has run a strong campaign. But Rep. Jeff FlakeJeff Flake9 GOP senators Trump must watch out for The road ahead for America’s highways Graham, Durbin reintroduce bill to protect 'Dreamers' MORE (R-Ariz.) led Carmona in the two most recent independent polls of the race, indicating the red lean of the state may be too much for Carmona to overcome on Election Day.

Watch the ad: