European Commission President Ursula von der Leyen, German Chancellor Friedrich Merz, and Finnish President Alexander Stubb will join a meeting between U.S. President Donald Trump and Ukrainian President Volodymyr Zelensky at the White House. The discussions will focus on security guarantees, regional stability, and continued sanctions against Russia. The meeting follows concerns after the Trump-Putin summit in Alaska and aims to reinforce support for Ukraine, address territorial integrity, and shape future diplomatic and military cooperation between the U.S. and European allies.