President Joseph R. Biden, Jr. spoke today with President Volodymyr Zelenskyy of Ukraine. President Biden reaffirmed the commitment of the United States to Ukraine's sovereignty and territorial integrity. President Biden made clear that the United States would respond swiftly and decisively, together with its Allies and partners, to any further Russian aggression against Ukraine. The two leaders agreed on the importance of continuing to pursue diplomacy and deterrence in response to Russia's military build-up on Ukraine's borders.