Trump called Putin 'crazy' over the weekend and said May 27 he's 'playing with fire' as he continues to bombard Ukraine during peace negotiations.

The White House faces the question of whether its appeasement of Russia has failed to achieve the ceasefire it promised and instead emboldened the Kremlin on the battlefield.

But in recent weeks, the relationship has begun to show signs of strain.

Trump previously said his personal relationship with Putin would usher in peace for Ukraine. Now, he says Putin's gone "absolutely CRAZY!"

Britain will attend the next round of peace talks between Russia and Ukraine, the Donald Trump administration has claimed. Trump’s special envoy to Ukraine, Keith Kellogg, told US outlet ABC News that the national security advisors of the UK,

President Donald Trump has warned Russian President Vladimir Putin that he has a "week and a half to two weeks" to prove he is serious about ending the war in Ukraine

A top Kremlin aide has accused Donald Trump of being “not sufficiently informed” about the situation in Ukraine after the US president said Russian leader Vladimir Putin was “playing with fire.”

President Donald Trump on Tuesday signaled that his patience with Vladimir Putin is running thin, warning the Russian leader that he is “playing with fire” by refusing to engage in serious peace talks about ending the war in Ukraine.