Democrat Barack Obama surged to a four-point lead over John Edwards in Iowa, with Hillary Clinton fading to third just hours before the first presidential nominating contest, according to a Reuters/C-SPAN/Zogby poll released on Thursday. Obama and Edwards gained ground overnight in the tracking poll, and Clinton fell four points to third place -- a finish that, if it held, would deal a dramatic setback to the one-time Democratic front-runner.
Obama was at 31 percent among likely Democratic caucus-goers, Edwards at 27 percent and Clinton 24 percent. No other Democrat was in double digits.