But the U.S. hasn’t provided nearly enough launchers to blunt the Russian equipment advantage. Ohio Republican Rob Portman, who is co-chairman of the Senate Ukraine caucus, on the Senate floor this week offered a blunt assessment of the facts on the ground: Brutal fighting continues in Severodonetsk, where the Russians are making grinding progress, and the Luhansk region could fall within weeks if the Ukrainians can’t get longer-range artillery. “Because the Russians have more artillery than the Ukrainians and their weapons have longer ranges,” the Senator explained, “the Russian forces concentrate massive firepower on Ukrainian positions at distances, which the...