Why does Donald Trump want to buy Greenland?

Donald Trump has again floated the idea of US control of Greenland – but why do the US want it, and why are Denmark and Greenland pushing back? Donald Trump has reiterated his interest in annexing Greenland, while Denmark’s prime minister has urged him to “stop the threats” concerning the island. Speaking to reporters, Trump said “we need Greenland from the standpoint of national security”. The president’s comments follow a major military operation in Venezuela on Saturday, in which President Nicolás Maduro and his wife were detained and transferred to New York. Trump has said that the US would “run”…