Mexico enraged at Donald Trump's 20% import tax plan

The US and Mexico conduct some $1.6bn cross-border trade a day - for now.

Donald Trump has triggered a diplomatic clash and a fresh fight over trade as the White House proposed a 20% tax on imports from Mexico and its president scrapped next week's trip to Washington.

The swift fall-out signalled a remarkable souring of relations between Washington and one of its most important international partners just days into the new US president's administration.