The FBI has unexpectedly released documents concerning ex-president Bill Clinton's pardon of the husband of a wealthy Democratic donor, in a surprise move just days before the election in which his wife is seeking to become America's first female president. The release of the heavily redacted 129-page report over the pardon of trader Marc Rich -- an investigation that closed in 2005 without charges -- triggered questions from Democrats already angered by the FBI's probe into hundreds of thousands of newly uncovered emails possibly linked to Hillary Clinton. While the Rich documents were published online Monday, they received little notice until they were posted on Tuesday on a Twitter account for the Federal Bureau of Investigation's division managing Freedom of Information Act (FOIA) requests…