Here are some key takeaways from the high-stakes meeting. President Trump on Monday said the United States will be involved in security assistance for Ukraine -- a key condition for Zelenskyy in any deal to end the war -- but did not elaborate on what exactly that would look like or give any specifics.

President Trump skirted delicate questions about whether Ukraine should cede territory that the country has defended at great cost, and referred to European leaders waiting in the White House as friends.