Pinal County Sheriff Paul Babeu is back on TV pitching for Sen. John McCain (R-Ariz.).

The sheriff is one of several law enforcement officers featured in a new 30-second spot released by the McCain camp Friday. Babeu appeared in McCain's earlier, and much-maligned, "Danged Fence" ad.

This one talks up McCain's efforts to secure the border and how he is "stand[ing] up" to President Obama, who has made protecting the border "incredibly difficult."

The ad's release comes as McCain prepares to meet primary challengers J.D. Hayworth and Jim Deakin in a debate  Friday night in Phoenix. A recent poll shows McCain pulling ahead of his rivals.