Which US President was most responsible for establishing Detente?

Question

The period of Detente which occured post Cuban missile criss was perhaps the first step toward peaceful co-existence between the Soviets and Americans. Which American President was most responsible for establishing it?

Answer 1

Détente negotiations began during the Nixon presidency. But the person who truly established it was not a U.S. president; the credit should probably go to Willy Brandt, Chancellor of West Germany in 1969-1974. Détente was in many respects a U.S. reaction to the general warming up in the East-West relations, which Brandt spearheaded...

Answer 2

President Richard Nixon and his Secretary of State Henry Kissinger.