Overall, the U.S. effort at the International Criminal Court Review Conference in Kampala was a qualified success. The outcome could have been much worse. While the conference adopted the Belgian amendment, creating a precedent for criminalizing the use of additional weapons as war crimes under the Rome Statute, the U.S. did succeed in minimizing the immediate risks to U.S. interests and nationals. The conference also passed a resolution that, if confirmed by future action by the states parties, would grant the ICC jurisdiction over the crime of aggression. Critically, the U.S. was successful in persuading the states parties to restrict the ICC’s jurisdiction over aggression in several significant ways that should help protect U.S. interests. However, the Obama Administration’s modest success in Kampala did little to address ongoing U.S. concerns about politicization of the court and illegitimate claims of ICC jurisdiction over U.S. service members and officials charged with war crimes, crimes against humanity, and genocide. The U.S. should not consider ratifying the Rome Statute until all of its serious concerns about the ICC are completely resolved.