Trump trip to Saudi Arabia, Israel, Europe: what could go wrong?

Jonathan Eyal of the Royal United Services Institute, a London-based think tank, says the opening of NATO’s new headquarters will be a useful symbol of “NATO 2.0”. But nobody can predict how Trump will behave among 27 other heads of government. Presidents usually wear their first-among-equals status lightly. “They are expected to be on top of their brief, cool and empathetic — everything Mr Trump is not,” says Eyal. “Things could go horribly wrong.”