It means a peace deal on the Ukraine-Russia war is hanging in the balance.
A White House summit between Trump and Zelenskyy ended abruptly after a reported shouting match. Trump claimed Zelenskyy is "not ready for peace" and accused him of disrespecting the U.S. by seeking security guarantees and refusing to compromise with Russia. Zelenskyy, in turn, rejected compromises with Russia while showing Trump evidence of Russian war atrocities. Trump stated Ukraine must make a deal with the U.S. or risk losing American support.