Voters who said they considered themselves moderate or independent supported Mr. Kerry by a margin of nearly two to one, according to surveys.
The campaign says it has commitments from 2,600 Iowans who have never voted in caucuses but say they will support Mr. Kerry.
Even so, both Lees said they had no reluctance about supporting Mr. Kerry, who is seen by some as stiff and distant.
Outside advocacy groups like labor unions and environmental organizations will also continue to support Mr. Kerry.
Though party committees and outside groups can raise and spend money to support Mr. Kerry, most cannot legally coordinate this spending with his campaign.
If she does vote, she said she will support Mr. Kerry despite her misgivings.
Which two of the following animals have been featured in advertisements supporting Mr. Kerry?
Kerry allies, some relatives of victims and a firefighters union supporting Mr. Kerry said they were objectionable.
Carole Summers, 76, said she supported Mr. Kerry because "he has a nice head of hair."
The Democratic Party and several outside groups plan to spend millions on television advertisements to support Mr. Kerry.