The details of conversation between the US President his top officials clearly suggest that US did try to convince China to initiate a military action against India while the 1971 India-Pakistan war was on.
Jack Anderson, an American investigative journalist, first reported about the US tilt towards Pakistan under secret orders from then President Richard Nixon. Anderson got the Pulitzer Prize for national reporting in 1972 for his reports on US’ tilt away from India. The United States administration had ordered a high-level inquiry into the special reports by Anderson in The Washington Post on December 14 and December 16, 1971.
The declassification of vital CIA and US State Department documents relating to South Asia reveals that the American spy agency (CIA) had a vital source in Mrs Gandhi's cabinet. CIA's 'reliable source' leaked India's war objectives to the US, thereby compromising India's plan to teach Pakistan a lasting lesson.