“‘I’ve never seen anything like it,’ Gov. Chet Culver, a Democrat who has not endorsed anyone in the race, said in an interview in his office on Friday. ‘The get-out-the-vote efforts are going to be the best ever.’” As Iowa looms next Thursday and the polls still suggest a virtual dead heat, the Dem candidates ready the ground troops. (Zogby has Clinton at 31% to Obama’s 27% and Edwards’ 24%. McClatchy puts Edwards in front with 24%, followed by Clinton at 23% and Obama at 22%.) “The developments reflect the tightness of the race…and the dynamics of an unusual contest where so few people vote: about 125,000 in the Democratic caucus of 2004. Aides to the candidates said this contest could be determined by a swing of as few as 1,000 voters.“