Richard M. Nixon is one of the most complex individual in recent history. He is best known for Watergate thatcontinues to resonate in American politics even a quarter-century after the event.However, Watergate cannot completely overshadow the positive effects of Nixon's presidency. He was a skilled negotiator, and well-versed in foreign affairs, Nixon is the president who improved relations between the United States and Communist China. His 1972 state visit to China was the first ever by an American president. Nixon also improved relations between the United States and the Soviet Union, creating an era of "detente." He and Soviet leader Leonid Brezhnev signed a nuclear arms treaty as well as several accords on culture and science (Profiles of presidents, 2007).