As we hit the three-year mark since the invasion of Ukraine by Russian forces, Europe and NATO appear to be at their most fractured and vulnerable.

Trump has horrified European allies with his attacks on Volodymyr Zelenskyy and what critics say is a soft take on Vladimir Putin.

Russian President Vladimir Putin said on Monday that Russia was not opposed to Europe's involvement in Russia-U.S. peace talks aimed at settling the conflict in Ukraine, but noted that Brussels had long rejected any dialogue with Moscow.