(CNN)–Senator Hillary Clinton, D-New York, is leading the pack of Democratic presidential candidates in the politically crucial state of Iowa, according to a poll of likely caucus participants released by the Des Moines Register on Sunday.
In the poll, Clinton registered 29 percent of those polled. Former North Carolina senator John Edwards, and Senator Barack Obama, D-Illinois, came in with 23 percent and 22 percent respectively. New Mexico Governor Bill Richardson registered 8 percent support in the poll, with Sen. Joe Biden, D-Delaware, at five percent, and Sen. Chris Dodd, D-Connecticut, and Rep. Dennis Kucinich, D-Ohio at 1 percent each.
The numbers were a significant change from the paper's last poll in May, when Clinton came in third, behind Edwards who was up top, followed by Obama in second place.
On the Republican side, there was no change from the poll in May, as former Massachusetts governor Mitt Romney held on to his lead with 29 percent support of those likely GOP caucus goers polled. Former Tennessee senator Fred Thompson, who formally entered the race last month, had 18 percent.
Former Arkansas governor Mike Huckabee, who came in second place in the Ames Iowa straw poll in August, was third in the poll at 12 percent, followed by former New York mayor Rudy Giuliani at 11 percent. They were followed by Sen. John McCain, R-Arizona, at 7 percent, Rep. Tom Tancredo, R-Colorado, at 5 percent, and Rep. Ron Paul, R-Texas at 4 percent. Former Ambassador Alan Keyes had 2 percent support, followed by Rep. Duncan Hunter, R-California at 1 percent.
The Register said the Democratic survey had a margin of error of plus or minus 4.9 percentage points. The paper said the poll of likely Republican caucus goers had the same margin of error.
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- CNN Political Desk Editor Jamie Crawford