Senator Barack Obama led over rival Hillary Clinton as Democratic caucus results continued to come in from the tiny, US territory of Guam on Saturday, the dpa reported.
With 95 per cent of precincts reporting, Obama had received 53 per cent of the vote to Clinton's 47 per cent, with just more than 200 votes between the candidates, who are locked in a tight contest to secure their party's presidential nomination that has brought the unlikely political spotlight to the Pacific island.
The Democrats will formally choose a presidential candidate at their nominating convention in late August in Denver ahead of November general elections.
Guam will elect just four delegates with full voting rights to the convention, but each vote counts in the closest-ever nomination race. According to the website RealClearPolitics.com, Obama already has 1,738 delegates, to Clinton's 1,599. Both are still a long way off the 2,024 needed to secure the nomination.
More important than the number of delegates is the chance to flaunt a triumph over the losing rival - even if that triumph takes place more than 20 hours from Washington on an island with only 170,000 people.
Guam has little in common with the mainland, and its importance is almost exclusively strategic. The 550-square-kilometer island is home to US Navy and Air Force bases.
Though its delegates may be the focus Saturday, Guam will likely fall back into political obscurity as its citizens cannot even vote in November's presidential election.