U.S. Sen. John McCain is blasting his challenger J.D. Hayworth, saying he’s mischaracterized his record to score political points in the wake of the murder of a Douglas rancher over the weekend. Former Congressman Hayworth is blasting back, meanwhile, saying McCain’s record on immigration is out of step with what Arizona wants. Speaking on a Phoenix broadcast station about the case of Robert Krentz, who was believed to have been shot and killed by an illegal immigrant, Hayworth said he has long advocated for a military presence on the border while McCain worked on an “amnesty bill” with former U.S....