Failing to light a fire under the Pentagon and his National Security Council, President Joe Biden risks blowing a critical opportunity. Namely, an opportunity to ready Ukraine for a major Russian offensive in and beyond the country’s southeastern Donbas region.

Biden deserves credit for unifying much of the world in Ukraine’s support. He also deserves credit for approving, albeit belatedly on Wednesday, the supply of Ukraine with a new $800 million military package including helicopters, armored vehicles, and cannon artillery. Unfortunately, Biden has failed to get Ukraine anywhere the number of weapons it needs to fight Russia in what’s known as the “deep battlespace.” As I noted in late March, Ukraine needs longer-range drones, rocket artillery, and more lethal tactical combat drones.