Former Rep. J.D. Hayworth (R-Ariz.) is unlikely to run in a GOP primary against Sen. John McCain (Ariz.), let alone win, Sen. Jon Kyl (R-Ariz.) said Monday. Kyl, the second-ranking Republican in the Senate, said he expects the former congressman, who's been mulling a primary challenge to McCain's right next year, to carry on his activities as host of a radio show, and not as a candidate.