As the Democrats start to coalesce around Barack Obama, those coming over to his side appear to be drawn from some of the key constituencies that supported Hillary Clinton during the campaign, according to Gallup data gathered between May 1-13. As of now, Clinton’s support among whites, women and voters with high school degrees or less have dipped just below 50 percent, while her support among Hispanics stands at 51 percent. Among the first three groups, Obama is now statistically even with Clinton; among Hispanics he trails by 7 points. Gallup says that only major demographic group still supporting Clinton by more than the 51 percent she registers with Hispanics are women over 50.

Meanwhile, Gallup’s daily tracking poll, conducted May 17-19, now has Obama leading Clinton 54 percent to 40 percent.