President Biden on Saturday signed legislation to support Ukraine with an additional $40 billion in U.S. assistance as the Russian invasion approaches its fourth month.

The legislation, which was passed by Congress with bipartisan support, deepens the U.S. commitment to Ukraine at a time of uncertainty about the war�s future. Ukraine has successfully defended Kyiv, and Russia has refocused its offensive on the country�s east, but American officials warn of the potential for a prolonged conflict.

The funding is intended to support Ukraine through September, and it dwarfs an earlier emergency measure that provided $13.6 billion.

The new legislation will provide $20 billion in military assistance, ensuring a steady stream of advanced weapons that have been used to blunt Russia�s advances. There�s also $8 billion in general economic support, $5 billion to address global food shortages that could result from the collapse of Ukrainian agriculture and more than $1 billion to help refugees.

Biden signed the measure under unusual circumstances. Because he�s in the middle of a trip to Asia, a U.S. official brought the bill on a commercial flight to Seoul for the president to sign, according to a White House official.

The logistics reflect a sense of urgency around continuing U.S. support for Ukraine, but also the overlapping international challenges facing Biden. Even as he tries to reorient American foreign policy to confront China, he�s continuing to direct resources to the largest conflict in Europe since World War II.

Biden also signed an unrelated measure, one intended to increase access to baby formula at a time when supplies remain scarce in the United States. The legislation will allow government benefits from the Special Supplemental Nutrition Program for Women, Infants, and Children � better known as WIC � to be used to buy more types of infant formula.

(AP)