Washington (CNN) - President Obama tersely reminded Sen. John McCain Thursday during the White House health care summit that, "We're not campaigning anymore. The election is over."
The president was referring to the 2008 presidential race, but McCain still has a Senate campaign to deal with back in Arizona. And on Friday, his re-election campaign released yet another radio spot, this time enlisting his fellow Arizona Sen. Jon Kyl to promote McCain's "conservative principles."
Kyl narrates the 30-second ad and tell listeners: "Arizona could have no stronger advocate than John. He's with me every step of the way in fighting for conservative principles in Washington."
McCain is facing a challenge on his right flank from former Rep. J.D. Hayworth in the Republican primary.