Senator John McCain, whose reelection campaign has adopted a decidedly anti-maverick slant, released a new radio ad Wednesday assailing his primary challenger J.D. Hayworth’s proclivity for earmarking while in the House of Representatives. The 60-second spot features anti-pork crusader Congressman Jeff Flake, Republican of Arizona, who credits McCain with a career devoted to eliminating wasteful federal spending and aligns Hayworth with big spending Democrats. “Republicans, including Senator McCain’s opponent, lost their bearings on federal spending,” Flake said. “They loaded up bills with pork barrel projects, and the voters punished Republicans by putting Democrats in charge.”