President Barack Obama has defeated his Republican challenger Mitt Romney to win a second and final term in office.
โอบาม่าคว้าชัยชนะ ชิงตำแหน่งประธานาธิบดีสมัยที่ 2

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President Barack Obama waves as he walks on stage with first lady Michelle Obama and daughters Malia and Sasha at his election night party November 7, 2012, in Chicago, Illinois.

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President Barack Obama speaks at his election night party November 7, 2012, in Chicago, Illinois.

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A Ukrainian soldier stands behind a fence while armed men block the headquarters of the Ukrainian Navy in Sevastopol.

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Republican presidential candidate Mitt Romney waves to supporters before conceding at his election night rally, November 7, 2012, in Boston, Massachusetts.