Reaction to US power vacuum is unknowable

Now that Donald Trump has withdrawn the US from its role as world leader, there will likely be a mix of order and disorder at regional and global level, says Richard N Haass. 

ITis increasingly clear that US president Donald Trump represents a departure when it comes to America’s global outlook and behaviour.

As a result, the US will no longer play the leading international role that has defined its foreign policy for three quarters of a century, under Democratic and Republican presidents alike.