(CNN) In the last few weeks the two presidential nominees have received their initial intelligence briefings. Until late 1975, a CIA officer stood by him practically every day as he read the President's Daily Brief, ready to answer any question Ford might have. But Nixon's issue with the President's Daily Brief was not just social insecurity. On January 24, 1970, the President's Daily Brief noted that "if the leftist parties can submerge their difficulties, (Allende) might be in a strong position to win the presidency." The world of the President's Daily Brief only got more complicated for a president after 9/11.

Source: CNN August 26, 2016 17:57 UTC