New Jersey superdelegate switches to Obama

The battle between Barack Obama and Hillary Clinton for superdelegates is so close and contentious that the Obama campaign is sending out releases bragging that a single one has switched.

Christine "Roz" Samuels, a local Democratic committee member and former teachers union official in Montclair, N.J., said she switched from Clinton to Obama because he can unite the country:

"I now support Barack Obama because he has brought about a new wave of hope and energy to this country, especially among our young people, who represent our future," she said in a statement issued by the Obama camp today. "People want to see change. Barack can help unite this country and help us embrace our diverse nation."

The nearly 800 superdelegates -- elected officials, party leaders, and others -- could swing the nomination race because it appears unlikely that either Obama or Clinton will reach the 2,025 threshold just from primaries and caucuses.