Key Alaska allies of John McCain are trying to derail a politically charged investigation into Gov. Sarah Palin's firing of her public safety commissioner in order to prevent a so-called "October surprise" that would produce embarrassing information about the vice presidential candidate on the eve of the election. In a move endorsed by the McCain campaign Friday, John Coghill, the GOP chairman of the state House Rules Committee, wrote a letter seeking a meeting of Alaska's bipartisan Legislative Council in order to remove the Democratic state senator in charge of the so-called "troopergate" investigation....