Barack Obama has defeated Hillary Rodham Clinton in Saturday's Democratic caucuses on Guam by just seven votes. More than 4,500 island Democrats voted. Neither candidate campaigned on the island in person. Results of the all-night count completed Sunday morning Guam time show delegates pledged to Obama with 2,264 votes to 2,257 for Clinton's slate. The territory sends four pledged delegates and five superdelegates to the National Convention in August in Denver, although US citizens on the island have no vote in the November election.