The White House, ahead of Monday's meeting, asked Zelensky to wear a traditional suit and tie, according to a European official and another person involved in planning. The request came through the office that handles White House protocol, though a spokeswoman declined to comment publicly.

For Ukrainian President Volodymyr Zelenskyy, yesterday began with a diplomatic whirlwind.

Obviously, Ukraine’s sovereignty and territorial integrity are inviolable and must remain absolutely nonnegotiable.