Ukrainian President Volodymyr Zelenskiy said on Tuesday that he had had a "productive" conversation with his U.S. counterpart Donald Trump on ending the war, sanctions on Russia and the finalisation of a U.

BBC Russia Editor Steve Rosenberg on how the relationship has gone off the rails.

As the relationship between President Trump and President Putin continues to deteriorate, with Trump threatening harsher sanctions on Russia if a ceasefire agreement with Ukraine is not reached, CNN’s Frederik Pleitgen talks to Moscow residents about their thoughts on the tensions between the two countries.