Donald Trump 'hombres' comment light-hearted, White House source says

Donald Trump was being "light-hearted" when he told Mexican President Enrique Pena Nieto that he might send US troops to deal with "bad hombres down there" if the Mexican military does not, a White House source has said.

The official says the remark was meant to be a reference to co-operation between the countries in fighting drug cartels.