Critics warned that other world leaders were powerless to stop Volodymyr Zelensky being caught 'with his head in a vice' by the American and Russian leaders when he visits Mr Trump.

Trump agrees to follow-up summit with Putin, Zelenskyy, and warns ‘severe consequences’ unless Russia agrees to truce.

Zelensky said he had been invited to the White House after a 'long and substantive' conversation with Trump which lasted for more than 90 minutes and later involved European…