He is set to offer another $750 million in military and other help to Ukraine, bringing the total to almost $2 billion since Russia invaded the nation.

The fresh package of help, announced by the administration on March 16, is virtually delivered, according to top military officials. Ukrainian authorities said they need Mi-17 helicopters and marine drones to protect against Russian soldiers.

The new funds will come from the Presidential Drawdown Authority, which the president can use in emergencies without waiting for congressional approval. Congress received notification that the administration was preparing to announce the new package on Tuesday, a person familiar with the matter said.