Whobwas the first us president to travel communist china and moscow

Richard M. Nixon was the first US president to travel to Communist China and Moscow. The visit to China was the start of reviving the relationship between the US and China after 25 years of no diplomatic ties and no communication. This visit also gave the US more leverage over the Soviet Union.
Nixon's visit to Moscow in 1972 was for the Moscow Summit. There, the Anti-Ballistic Missile Treaty, the first Strategic Arms Limitation Treaty and the U.S.-Soviet incidents at Sea Agreement were signed.