Trump visits US border as Democrats accuse him of sabotaging progress

Republican presidential nominee former president Donald Trump speaks during a campaign rally at North Carolina Aviation Museum (Julia Nikhinson/AP)

Donald Trump is travelling to the shrub-dotted hills of Arizona near the US-Mexico border to campaign on immigration, his signature issue since launching his first successful presidential bid nine years ago.

The visit is the fourth in a series of events held in battleground states this week to try to draw the focus away from Democrats’ celebration of Vice President Kamala Harris’ presidential nomination in Chicago.