President Donald Trump said Sunday he views his Ukrainian counterpart Volodomyr Zelensky as “calmer” and more interested in reaching a peace accord following their sit-down inside the Vatican this weekend.

The United States has been pushing Ukraine to accept a peace plan that seems in part a gift to Moscow. But the short meeting of the leaders, and subsequent comments, appeared to be a change in tone.

National security adviser Mike Waltz expressed optimism on where things stand regarding peace negotiations between Russia and Ukraine, which included Ukrainian President Volodymyr Zelensky meeting with President Donald Trump over the weekend.