Lynda Bird Johnson Robb is the oldest living child of a U.S. President following the death of a United States Army officer who served as the United States Ambassador to where?
Lynda Bird Johnson Robb: Lynda Bird Johnson Robb (born March 19, 1944) is an American chairwoman and magazine editor who served as First Lady of Virginia from 1982 to 1986, before that as Second Lady of Virginia from 1978 to 1982. Lynda Bird Johnson Robb:  She is the oldest living child of a U.S. President following the death of John Eisenhower on December 21, 2013. John Eisenhower: John Sheldon Doud Eisenhower (August 3, 1922 – December 21, 2013) was a United States Army officer and military historian.
i don't know