Lawmakers, former diplomats and experts questioned the Trump administration’s decision to halt the supply of some air-defense weapons to Ukraine, saying the move risks prolonging the war with Russia and leaving the country more vulnerable to stepped-up missile and drone barrages.

The move "was made to put America’s interests first," a White House spokeswoman said, as U.S. munitions have been depleted in recent years.

The U.S. is halting some shipments of weapons to Ukraine amid concerns that its own stockpiles have declined too much.