Health care and Iraq dominate Democrats' concerns in the three pivotal early voting states of the 2008 presidential race. Advantage: Hillary Clinton, a poll shows.

Clinton has clear leads in New Hampshire and South Carolina, building on her ownership of the health-care issue and her broad but more fragile trust among Democrats on Iraq, the survey showed Monday. Yet she could stumble in Iowa, whose Jan. 3 caucuses will be the first voting and where she is in a scramble with Barack Obama, trailed closely by John Edwards.

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