A new CNN poll out this morning suggests the Democratic race in Iowa has tightened even further.
It puts Hillary Clinton at 30 percent, Barack Obama at 28 percent, and John Edwards at 26 percent -- all within the survey's margin of error of 4 percentage points.
The statistical tie is the latest evidence of a resurgence by Edwards, who has been in third place, significantly behind Clinton and Obama, in other polls. Edwards, the former US senator from North Carolina, has the advantage of having gone through the caucus process in 2004, and his supporters are more likely than his rivals' backers to have attended past caucuses as well.
On the Republican side, Mike Huckabee leads Mitt Romney 33 percent to 25 percent. That gap is outside the poll's margin of error of plus or minus 5 percentage points. Rudy Giuliani is in third at 11 percent, and John McCain and Fred Thompson are tied for fourth at 9 percent, according to CNN.