Zelensky offers concession on NATO, Russia still impediment to peace deal, Trump vows consequences for ISIS attack on U.S. troops.

The Kremlin has described Ukraine's push to join NATO as one of the "root causes" of the conflict. Russia sees an expanding NATO as a major security threat. But NATO's expansion into the Baltics and other post-Soviet states is driven by a fear that Moscow would one day invade and try to fold them back under its control—as seen in Ukraine.

Ukraine has days to accept Trump's peace plan with US-led security guarantees, but Russia has reacted angrily to proposals allowing NATO-style troop deployment.

The U.S. has agreed to provide unspecified security guarantees to Ukraine as part of a peace deal to end Russia’s nearly four-year war, and more talks are likely this weekend, U.S. officials said

On Sunday, former President Donald Trump expressed disappointment in Ukrainian President Volodymyr Zelenskyy, stating that he is not prepared to endorse a peace plan proposed by the U.S. aimed at resolving the ongoing Russia-Ukraine conflict.