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Hillary Clinton is to be officially nominated at the Democratic National Convention in Philadelphia.

The US Democratic Party chair, Debbie Wasserman Schultz has resigned after leaked emails appeared to suggest that party insiders had tried to thwart the campaign by Hillary Clinton's rival, Bernie Sanders.

Supporters of Mr Sanders have been marching in the streets in protest at the recent controversy.

Barbara Plett-Usher spoke to one supporter who strongly opposes Mrs Clinton.

(Photo: Hillary Clinton. Credit: Getty Images)