Ukraine’s future could hinge on a hastily assembled meeting Monday at the White House as Ukrainian President Volodymyr Zelenskyy brings an extraordinary cadre of European leaders with him to show U.S. President Donald Trump a united front against Russia. British Prime Minister Keir Starmer, Italian Prime Minister Giorgia Meloni, French President Emmanuel Macron, German Chancellor Friedrich Merz along with the heads of NATO, the EU and Finland arrived at the White House for meetings with President Donald Trump and Zelenskyy on ending the war in Ukraine. The European political heavy-hitters were left out of Trump’s summit with Russian President Vladimir Putin last Friday in Alaska, and they're looking to safeguard Ukraine and the continent from any widening aggression from Moscow. Monday’s showing is a sign both of the progress and the possible distress coming out of the Friday summit, as many of Europe’s leaders are descending on Washington with the explicit goal of protecting Ukraine’s interests, a rare and sweeping show of diplomatic force.