Barack Obama has scored a clear win in the Democratic presidential primary in North Carolina, while Hillary Clinton has narrowly won the Indiana primary.
Senator Obama won 56% of the vote in North Carolina, while Senator Clinton won 51% of the vote in Indiana.
The votes were the final major Democratic primaries which help decide the party's White House candidate.
Neither scored a knock-out blow, but analysts say Mr Obama's lead looks increasingly unassailable.
Mrs Clinton has appealed to supporters for more funds to carry on the fight, but her team also announced that she had lent her campaign $6.4m (£3.28m) in the last month.
That is not a healthy sign, says the BBC's Justin Webb in West Virginia, where Mrs Clinton is campaigning. Contributors will not throw money at what they see as a lost cause, and without daily infusions of cash, presidential campaigns cannot survive, our correspondent says.
Mr Obama is leading the race in delegates who will choose the presidential nominee by 1,840 to 1,684, according to the Associated Press news agency.
Speaking to a raucous rally in Raleigh, North Carolina, Mr Obama said: "Tonight we stand less than 200 delegates away from securing the Democratic nomination for president of the United States."
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