WASHINGTON Ñ Senator Barack Obama won his 11th straight nominating contest on Thursday, carrying the Democrats Abroad global primary by a 2-to-1 margin over Senator Hillary Rodham Clinton and prevailing among American expatriates in every region of the world.

The results represented thousands of ballots submitted from Americans in 164 countries and territories from Feb. 5 to 12.

The overseas Democrats were allocating a small number of delegates Ð 4.5 Ñ on Thursday, under a proportional system that allotted 2.5 to Obama and 2 to Clinton. A further 2.5 will be determined at a Democrats Abroad convention on April 12 in Vancouver, Canada. The group also holds 4 superdelegate votes, for a total of 11 votes at the national convention in late August in Denver.

But in a close contest, Democrats Abroad said they felt particularly engaged.