evidence: Biden visits Zelensky in Kyiv and says Putin 'dead wrong' on Ukraine war The US will back Ukraine in its fight against Russia for "as long as it takes", US President Joe Biden has said on an unannounced visit to Kyiv. [...] President Biden's visit to Kyiv came ahead of a three-day visit to Poland where he will meet the country's President, Andrzej Duda, and east European members of the Nato military alliance.