Whether or not Zelensky does make the trip, the door for Europe has firmly remained shut since Trump retook office at the start of the year. At the time his envoy to Ukraine, Keith Kellogg, said the bloc wouldn't be involved in any peace talks. It's a position the Europeans have been unable to change through diplomacy.

As Donald Trump prepares for a pivotal meeting with Vladimir Putin, his unexpected praise for the Russian leader caused outrage.