Analysis-Zelenskiy's U.S. visit leaves unanswered questions

Ukraine's President Volodymyr Zelenskiy greets U.S. House Speaker Nancy Pelosi (D-CA) while U.S. Vice President Kamala Harris applauds during a joint meeting of U.S. Congress in the House Chamber of the U.S. Capitol in Washington, U.S., December 21, 2022. REUTERS/Jonathan Ernst

WASHINGTON (Reuters) - For President Volodymyr Zelenskiy, his surprise visit to Washington this week was a clear success: he returns to Europe with new financial and military commitments from the United States and bipartisan support for Ukraine's war with Russia.

But the visit also leaves several key questions unanswered, including how U.S. military support could evolve, whether Congressional support for the war will endure and - crucially - how the war will end.