With days to go to the US presidential election more than 60 million Americans have already taken advantage of early voting, breaking all records.
Fours years ago, Donald Trump made the issue of immigration into the United States across the Mexican border a central issue of his campaign.
He promised to build a wall across the border, to prevent illegal migration.
Huw Edwards presents the first of a series of special reports on the US election from Clive Myrie.
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