Trump has used tariffs as a stick to threaten the US's trading partners into submission, as in his spat with Mexico. But if the US cuts immigration from its southern neighbors, who will do the jobs Americans don't want?

President Donald Trump talks to reporters at the White House about immigrant children being separated from their parents after they cross the border illegally.

Greece deports the first group of migrants to Turkey as a landmark EU deal to stop the influx into Europe kicks in.