Sen. John McCain's campaign is calling on his primary challenger to disavow the backing of an anti-illegal immigration group that permits the use of terms such as "wetbacks" and "pepper bellies" – derisive epithets sometimes used for immigrants – on its website. "Let's be clear: Congressman [J.D.] Hayworth's continued flirtation with extreme groups that condone racism only opens the door for liberals to falsely paint all opponents of illegal immigration as bigots. Congressman Hayworth should immediately disavow this group’s support and commit to never again associating himself with groups that accept this kind of hateful and counterproductive rhetoric," McCain campaign...