RALEIGH, N.C. -- A new poll shows that New York Sen. Hillary Rodham Clinton has more support in Southern Atlantic states than all her Democratic rivals combined.

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Clinton has the support of 45 percent of adult voters in the region. That's far more than the 17 percent who said they'd vote for Illinois Sen. Barack Obama and the 11 percent who support John Edwards, a former North Carolina senator and a native of the region.

The Elon University poll found 19 percent of Democratic voters were undecided.

The survey involved 1,374 adults from households in Florida, Georgia, North Carolina, South Carolina and Virginia. It was conducted over the past two weeks and has a sampling error of plus or minus 2.7 percentage points.

Among Republicans, Rudy Giuliani leads with the support of 25 percent of voters, followed by Fred Thompson with 16 percent and Mitt Romney with 12 percent. The poll shows that nearly 30 percent of Republican supporters are still undecided.