Article continues below advertisementDonald Trump reportedly left a key European ally "traumatized" by his "psychological state" after a private meeting.Diplomats close to the situation told Politico that prime minister of Slovakia Robert Fico felt the president's behavior came across as "dangerous" during a recent sit-down at Mar-a-Lago.Fico - typically a fan of the 79-year-old POTUS - allegedly expressed concern in Brussels, Belgium, on January 22, while on the sidelines of an emergency EU summit organized to discuss transatlantic relations amid Trump's repeated threats to acquire Greenland.