Bernie Sanders has beaten Hillary Clinton in the Maine caucuses, the latest contest in the battle to be the Democratic presidential candidate.
With 91% of the vote counted, Vermont Senator Mr Sanders is polling 64%, while former Secretary of State Mrs Clinton has 36%.
In the Republican race, Marco Rubio easily won Puerto Rico's primary, beating billionaire Donald Trump.
Mrs Clinton and Mr Trump remain overall leaders in the nomination campaigns.
Sunday night saw Mrs Clinton and Mr Sanders clash on a number of issues in a CNN-hosted debate in Michigan.
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