CEDAR RAPIDS, IA - John McCain is fed up and not going to take it any more. At a Hawkeye State rally Thursday, he took his rhetoric up a notch and called for the firing of Securities and Exchange Commission Chairman Chris Cox. “The Chairman of the SEC serves at the appointment of the President and in my view has betrayed the publics trust. If I were President today, I would fire him,” McCain said at the 5,000 person event, accusing the SEC of failing to adequately police the market. “(The SEC) kept in place trading rules that let speculators...