Doing so would require the Russian leader to “accept the failure of sitting down with a president he considers a joke from a country that doesn’t exist”

The Ukrainian president says Monday's talks have been "constructive" as European leaders repeat calls for a ceasefire.

President Donald Trump welcomed Ukrainian President Volodymyr Zelenskyy to the White House for a high-stakes meeting as the U.S. president pushed for a deal to end Moscow's war on its neighbor. A host of European leaders joined the pair.