Sen. John McCain (R-AZ) spent more than $10M on his primary battle against ex-Rep. J.D. Hayworth (R), according to his 2ndQ campaign finance report, leaving him with a much narrower financial advantage in the GOP primary than he once enjoyed. McCain has spent a total of $15.7M this cycle, according to FEC reports, and he has just $1.78M left to spend before the Aug. 24 GOP primary. Hayworth had $922K in the bank, his reports showed. "Senator McCain takes every campaign seriously, and this race is no exception. Senator McCain is proud of the statewide support he's received from Arizonans,...