The threats, pressure and ultimatums have come and gone, but Russian President Vladimir Putin has maintained Moscow’s uncompromising demands in Ukraine, raising fears he could use a planned summit with U.

For President Vladimir V. Putin of Russia, it is an opportunity not just to end the Ukraine war on his terms, but to split apart the Western security alliance.

European nations have rallied behind Ukraine in advance of this week's summit between Trump and Putin, emphasizing that peace cannot be achieved without Kyiv's involvement.