On the day of his second inauguration, Donald Trump pulled out his big black Sharpie and scribbled out the Gulf of Mexico, renaming it the 'Gulf of America'.  Restoring Names that Honour American Greatness was the title of his executive order.  Donald Trump’s fantasy maps – from annexing Canada and Greenland, to claiming the Panama Canal– have been widely ridiculed.  But Trump is one of a number of world leaders challenging the cartographic status quo.  

• GUEST: Nick Danforth, fellow at the research centre, Century International; regular contributor to Foreign Policy Magazine