Trump puts Immigration at the centre of his campaign
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The view on the US-Mexico border

Donald Trump has again used the issue of illegal immigrants crossing the US-Mexican border as a key piece of his election campaign.

Chris Harris, border agent in San Diego, said illegal immigrants were crossing the border from a variety of countries. He spoke to Today special correspondent James Naughtie.

(Photo: James Naughtie with border patrol agent on the US-Mexican border Credit: BBC)