The US president has treated his French counterpart to a colourful welcome at the White House. As the two leaders stood for a photo-op, Donald Trump said he and Emmanuel Macron had 'a very special relationship' before brushing away what he said was a 'little piece' of dandruff from Macron's jacket to 'make him perfect'. While the French president has tried to develop a close relationship with Trump since taking office last May, he has so far seen few tangible results on issues from Iran to climate politics.

