Trump also slammed Zelensky for suggesting that the end of Russia's war against Ukraine likely "is still very, very far away."

For days Trump cabinet officials have suggested Ukraine’s President Volodymyr Zelensky might need to step aside. Yet Ukrainian officials and analysts told CNN any change of president in Kyiv would spark at least six months of political limbo,

The order, which takes effect immediately, affects more than $1 billion in arms and ammunition in the pipelines and on order.