At what was billed as an “historic” presidential summit, hastily put together in Alaska on Friday afternoon, the optics were as clear and overshadowing as the vast Chugach mountains glistening over Anchorage in the summer sun.

Trump officials defended the president’s peace push after meeting Putin, calling progress “game-changing” ahead of Zelensky’s visit to Washington.

On Sunday, Secretary of State Marco Rubio, who sat in on the meetings with Mr. Putin at the American air base outside of Anchorage, disputed the idea that the Europeans were coming as a posse to protect Mr. Zelensky from a repeat of the February shouting match.