US Democratic presidential nominee Hillary Clinton speaks during a campaign rally at the Pasco-Hernando State College in Dade City, Florida, on November 1, 2016. 

FBI agents are plumbing hundreds of thousands of emails in search of potentially incriminating evidence against Democratic nominee Hillary Clinton, in a high pressure probe seven days before the US presidential election. What will come out of it and when is not known, but the impact of the FBI's bombshell discovery of a new trove of Clinton emails is already reverberating in the neck-and-neck race for the White House.
 / AFP PHOTO / JEWEL SAMAD        (Photo credit should read JEWEL SAMAD/AFP/Getty Images)