From CNN's Jack Cafferty
Senator Hillary Clinton speaks to supporters Saturday at the National Building Museum in Washington, DC.
Hillary Clinton may be out of the race, but that doesn't mean her supporters are automatically going to flock to Barack Obama. Not by a long shot.
As she officially endorsed Obama on Saturday - Clinton urged the crowd to back Obama. When she said it, many cheered. But some supporters booed, loudly.
A CNN poll out Friday shows 60% of Clinton supporters say they'll vote for Obama, but 17% say they'll vote for Mccain and 22% say they won't vote at all.
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