A last-minute "October surprise" -- a dramatic news event that shakes up the U.S. election -- could be a wild card in the final three weeks of the fight for control of Congress. With Democrats threatening to sweep Republicans out of power in Congress in the Nov. 7 elections, a late-breaking foreign crisis, terrorist attack or another Washington scandal could change the debate and shape the ultimate outcome. The possibilities are numerous, as President George W. Bush juggles multiple foreign threats like North Korea's nuclear tests, Iran's nuclear ambitions and civil war in Iraq, along with mushrooming Republican scandals at...