The sanctions, announced on Friday, aim to restrict the ICC's ability to function. The United States has previously penalised ICC prosecutors and judges, but Rubio said this latest move goes further by seeking to disable the institution itself.
The ICC, established in 2002, is a permanent tribunal tasked with prosecuting war crimes, crimes against humanity and genocide. It has issued arrest warrants for more than 70 individuals, including Israeli Prime Minister Benjamin Netanyahu and Russian President Vladimir Putin. Washington has repeatedly denounced the court, particularly after it issued warrants for Israeli officials.
The timing of the sanctions drew attention because they came just hours after the Nobel committee awarded the Peace Prize to Navi Pillay, a former ICC judge and UN high commissioner for human rights. The coincidence underscored the tensions between the United States and an institution that the Trump administration views as a threat to national sovereignty.
European allies now face a difficult choice. The ICC relies on cooperation from its 125 member states, several of which are in Europe. If European nations refuse to enforce the sanctions or continue supporting the court financially and logistically, they could come into direct conflict with Washington. The White House has not indicated whether secondary sanctions would be applied to foreign entities that assist the ICC.