Presidential nominee in 2008 faces GOP primary fight. BY JOSEPH WEBER Former Rep. J.D. Hayworth, Arizona Republican, said in an interview Monday that his planned primary challenge to Sen. John McCain will portray the four-term incumbent as a not-so-conservative Republican who has "enabled" President Obama and his failed economic and security policies. "I'm giving Arizona Republicans a clear choice between a consistent, common-sense conservative . . . or someone who describes himself as a maverick but is a moderate," the outspoken Mr. Hayworth told The Washington Times' "America's Morning News" radio show. Mr. Hayworth, 51, quit his job Friday as...