[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2010/images/07/16/art.mccain.0624u.gi.jpg caption ="Sen. John McCain will square off in a debate against his opponents Friday night."](CNN) - John McCain will continue the fight to retain his Senate seat Friday as he debates his competitors in Arizona.
McCain will square off against former Rep. J.D. Hayworth and Tea Party activist Jim Deakin in a debate at 7 p.m (10 p.m. ET) at the studio of CNN-affiliate KTVK in Phoenix.
The three are vying for the Republican nomination for the U.S. Senate seat. The primary is scheduled for August 24.
McCain is widely ahead of his two challengers, according to a poll released this week.