In 1961, Adenauer had his concerns about both the status of Berlin and US leadership confirmed, as the Soviets and East Germans built the Berlin Wall. Adenauer had come into the year distrusting the new US President, John F. Kennedy. He doubted Kennedy's commitment to a free Berlin and a unified Germany and considered him undisciplined and naïve. For his part, Kennedy thought that Adenauer was a relic of the past. Their strained relationship impeded effective Western action on Berlin during 1961.