What does Volodymyr Zelensky's visit to Washington mean?

Volodymyr Zelensky's visit to Washington is "very strong symbolically because it's the first time the Ukrainian president has left Ukraine since the start of the war, and also because it confirms the United States' role as leader. It's a move that was made in Washington, not in Brussels or in a European capital", explains Eric Aunoble, historian, specialist in Ukraine.