Joe Biden: 'I will not be a presidential candidate but I will not be silent'

Vice-President Joe Biden has ruled out a run for the presidency, ending months of speculation.

Flanked by President Obama and his wife, Jill, Mr Biden said there was not enough time left for him to mount a successful campaign.

But he said he would "not be silent" during the campaign and urged candidates not to turn their backs on President Obama's record.