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The migrant caravan travelling through Mexico is producing significant tension in the United States, warns international relations specialist Professor Robert Patman.
Thousands of people fleeing violence and poverty in Central American nations are moving en masse in search of a better life in the United States.
US president Donald Trump has responded by calling the caravan an invasion and putting 5000 soldiers on alert along the border.
Prof Patman, of the University of Otago, says the situation has caused an unusual level of tension between the White House and the Pentagon, the White House and the media and the White House and the US tradition of welcoming migrants.
He spells out those tensions on the Otago Daily Times' new fortnightly international affairs programme, Global Insight.