The (Portland) Oregonian reported Tuesday that the Illinois senator leads Clinton 55 percent to 35 percent among registered Democrats, according to a poll conducted May 8-10 by Davis, Hibbitts & Midghall.

The poll found that Obama leads even among women voters, thought to be Clinton's strength, said pollster Tim Hibbitts.

The poll of 400 Democratic voters has a margin of error of plus or minus 4.8 percent.

"Barring a disaster, Barack Obama's going to win Oregon, and he may win it very big," Hibbitts was quoted by the newspaper as showing.