The US has imposed sanctions on senior officials in the International Criminal Court (ICC), including chief prosecutor Fatou Bensouda.
Secretary of State Mike Pompeo accused the court of "illegitimate attempts to subject Americans to its jurisdiction".
The Hague-based ICC is currently investigating whether US forces committed war crimes in Afghanistan.
I think this is one of the worst things that the US has done under Trump, it just tarnishes the use of sanctions by the US, and sets a precedent for countries like China to follow suit with international bodies they don't agree with.