This paper argues that if Donald Trump wins a second term in the upcoming election, the rest of the world will conclude that the United States has fundamentally changed and is no longer committed to the traditional leadership role it has played since the Second World War.

In this paper, Thomas Wright explores how US foreign policy would change should Donald Trump or Hillary Clinton win the US presidential election. Wright argues that a Trump presidency could see the United States undermine the liberal international order that it helped to establish. Clinton, by contrast, would be a more traditional internationalist president. Key...