AP-Pew poll also shows strong double-digit leads in NH and SC; Clinton leading on important issues, most electable

Hillary Clinton leads all Democrats in Iowa , according to a new AP-Pew poll showing her leading by 5 points, and an Iowa State poll showing her ahead by 7. In addition, new AP-Pew polls show her leading by 19 in New Hampshire and 14 in South Carolina . The polls also show her ahead on the issues most important to voters, as well as the most electable Democrat:

Iowa
• Hillary leads the AP-Pew poll with 31 percent, compared to 26 percent for Obama and 19 percent for Edwards.
• In addition, the new Iowa State University poll shows Hillary ahead with 31 percent, compared to 24 percent for Edwards, and 20 percent for Obama.

New Hampshire:
• Hillary leads the AP-Pew poll with 38 percent, doubling each of her opponents. Obama follows with 19 percent, and Edwards at 15 percent.

South Carolina:
• Hillary leads the AP-Pew poll with 45 percent, followed by Obama at 31 percent, and Edwards at 10 percent.
• Hillary and Obama are even among black voters in SC, and Hillary leads by 3-to-1 among white voters.

Support among key groups:
• In the AP-Pew polls , Hillary has amassed strong support among female, older, less-educated and lower-income Democrats -- significant because women and older voters in particular have dominated these primaries and caucuses in the past.
• Hillary leads among women in each state, drawing the support of nearly half of women in New Hampshire and South Carolina , and more than a third in Iowa .

Issues:
• In all three early states, Democrats trust Hillary more than her rivals on Iraq . She has double-digit leads in Iowa and New Hampshire on which candidate would make the wisest decisions about the war, and is tied in South Carolina .
• On health care, she doubles every opponent on who would best improve the country's medical system -- in each of the three states polled.
• Democrats in each state overwhelmingly call Hillary the Democrat with the best chance of winning the White House.