U.S. Sen. John McCain has spent an unprecedented $16 million to date fending off a challenge from former U.S. Congressman J.D. Hayworth. Hayworth, so far, has spent $1.5 million, according to campaign finance reports filed July 15. Hayworth’s spokesman, Mark Sanders, said the expenditure proves Hayworth is such a strong candidate that McCain pulled out all the stops with phone banking, mailers, radio and TV. “I think that the senator was really fearful of losing this race and he decided to just dump as much as he could into it to buy it,” he said. While candidates are allowed to...