Poll Tracker

The number of Hillary Clinton supporters who said, just before she dropped out in June and called for them to support Barack Obama, that they would go to the polls in November to vote for him has dropped from 60 percent to 54 percent, according to a CNN/Opinion Research poll released Friday. The poll said that in early June, 22 percent of Clinton supporters said they would not vote at all if Obama was the party's standard bearer but now almost a third say they will stay home. Forty-three percent of registered Democrats say they would still prefer Clinton as the nominee compared to 35 percent in June.

"Many voters find it tough to immediately switch allegiances to a candidate that they once opposed, so they find a 'neutral' setting more comfortable for awhile," said Keating Holland, CNN polling director. "If that's what is happening to the Clinton supporters who now say they plan to stay at home, Obama may have nothing to worry about. If not, there's a big chunk of the party base that Obama won't be able to count on in November."