who was the president of the us in 1971?
Richard Nixon
contradiction
 = = = Appointment of Gerald Ford as Vice President ( 1973 ) = = = 

entailment
 Richard Milhous Nixon ( January 9 , 1913 – April 22 , 1994 ) was the 37th President of the United States , serving from 1969 to 1974 when he became the only U.S. president to resign the office . Nixon had previously served as a U.S. Representative and Senator from California and as the 36th Vice President of the United States from 1953 to 1961 . 

neutral
 The run up to the 1968 presidential election saw the incumbent president , Lyndon B. Johnson , serving during a period of social unrest . There were riots in the major cities despite Johnson 's attempts to introduce anti @-@ poverty and anti @-@ discrimination legislation , and there was significant opposition to the ongoing military action in Vietnam . 

entailment
 During his rise to power , Richard Nixon became known as a leading anti @-@ communist . After he became president in 1969 , Nixon saw advantages in improving relations with China and the Soviet Union ; he hoped that détente would put pressure on the North Vietnamese to end the Vietnam War , and he might be able to manipulate the two main communist powers to the benefit of the United States . 

neutral
 Domestically , the scandal precipitated a drop in President Reagan 's popularity as his approval ratings saw " the largest single drop for any U.S. president in history " , from 67 % to 46 % in November 1986 , according to a New York Times / CBS News poll . The " Teflon President " , as Reagan was nicknamed by critics , survived the scandal , however , and by January 1989 a Gallup poll was " recording a 64 % approval rating " , the highest ever recorded for a departing President at that time . 
