Biden announced a historic joint donation of air defense equipment to Ukraine by Germany, the Netherlands, Romania, and Italy.
The senior US official also said the United States and some NATO allies will announce new steps "to strengthen Ukraine's air defenses and military capabilities to help Ukraine.
Trump's skepticism towards NATO is causing further anxiety this time, as Russia's war in Ukraine has brought conflict to the bloc's doorstep.
As Western pressure mounts on nations like Israel and Armenia to recalibrate ties with Moscow amidst Ukraine tensions, geopolitical alliances are swiftly evolving.
NATO Sec.-Gen. Jens Stoltenberg said North Korea had provided "an enormous amount of ammunition" to Russia while both China and Iran were supporting Moscow militarily in its war against Ukraine.
His state visit comes amid US accusations that North Korea has supplied "dozens of ballistic missiles and over 11,000 containers of munitions to Russia" for use in Ukraine.
Zelensky has failed to achieve any of his goals and is leading his country into an abyss after losing many parts of Ukraine.