From the latest Gallup poll:
Gallup Poll Daily tracking has documented a surge in Democratic voters' support for Barack Obama over Hillary Clinton in recent days, swelling from a four percentage-point lead for Obama during the first part of May to a record 16-point lead for him in polling from May 16-18.
...The broadening of Obama's appeal for the nomination seen in Gallup's May 16-18 polling is fairly widespread, with the percentage favoring him increasing among most demographic categories of Democratic voters. However, as a result, certain groups that were already highly supportive of Obama for the nomination -- men, 18- to 29-year-olds, postgrads, and upper-income Democrats -- are now overwhelmingly in his camp. Obama is currently favored among these groups by a 2-to-1 margin, or better, over Clinton.
...At the same time, support for Clinton among some of her traditionally stalwart support groups -- women, Easterners, whites, adults with no college education, and Hispanics -- has fallen below 50%.
