When President Donald Trump spoke last week by telephone with Vladimir Putin, the Russian leader committed to drafting and sending what he described as a “memorandum of peace” in the coming days laying out Russian requirements for a ceasefire with Ukraine,

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By Steve Holland, Tom Balmforth and Yuliia Dysa WASHINGTON/KYIV (Reuters) -U.S. President Donald Trump on Tuesday said Vladimir Putin was "playing with fire" by refusing to engage in ceasefire talks with Kyiv as Russian forces made gains in Ukraine's northeast.