Barack Obama looks set to move another step closer to securing the Democratic nomination for the US presidential election this evening.
Democrat supporters are due to go to the polls in Kentucky and Oregon to say whether they want Obama or Hillary Clinton to face John McCain in November's election.
Obama is virtually certain to secure the nomination given his current lead and has already switched his attention to areas where he will have to battle for votes in November.
However, Mrs Clinton is vowing to fight on, even though her narrow chances of victory are growing slimmer by the week.
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