[Answer] At what school did the man who was the great grandson of one president and the grandson of another president become a history professor in the 1870's?

Step 1 : Introduction to the question "At what school did the man who was the great grandson of one president and the grandson of another president become a history professor in the 1870's?"

...Hint :Cambridge

[Ans] Before Dwight Eisenhower renamed Camp David for his grandson, FDR named it what?

Step 1 : Introduction to the question "Before Dwight Eisenhower renamed Camp David for his grandson, FDR named it what?"

Presidents Franklin D. Roosevelt and Harry Truman originally called the Maryland presidential retreat, which opened in 1938, "Shangri-La" after the fictional Himalayan paradise. Dwight Eisenhower, however, wanted a less formal moniker so he renamed it in 1953 in honor of his 5-year-old grandson, David. “Shangri-La was just a little fancy for a Kansas farm boy,” he wrote in a 1953 letter to friend Edward “Swede” Hazlett. Soviet leader Nikita Khrushchev, who was brought by Eisenhower to the retreat, thought it sounded like a place where “stray dogs were sent to die,” but all subsequent chief executives have kept the name.

[Answer] Before Dwight Eisenhower renamed Camp David for his grandson, FDR named it what?

Step 1 : Introduction to the question "Before Dwight Eisenhower renamed Camp David for his grandson, FDR named it what?"

...Presidents Franklin D. Roosevelt and Harry Truman originally called the Maryland presidential retreat, which opened in 1938, "Shangri-La" after the fictional Himalayan paradise. Dwight Eisenhower, however, wanted a less formal moniker so he renamed it in 1953 in honor of his 5-year-old grandson, David. “Shangri-La was just a little fancy for a Kansas farm boy,” he wrote in a 1953 letter to friend Edward “Swede” Hazlett. Soviet leader Nikita Khrushchev, who was brought by Eisenhower to the retreat, thought it sounded like a place where “stray dogs were sent to die,” but all subsequent chief executives have kept the name.

[Answer] David Eisenhower, grandson of President Dwight Eisenhower, married which President's daughter?

Step 1 : Introduction to the question "David Eisenhower, grandson of President Dwight Eisenhower, married which President's daughter?"

...On this day in 1968, Julie Nixon and David Eisenhower, both progeny of United States presidents, tied the knot in New York City. Julie Nixon was the daughter of Richard M. Nixon, who was running for president at the time of the wedding. Her groom was the grandson of Dwight D. Eisenhower, who served as America’s 34th president. Julie and David met at the Republican National Convention in 1956 while his grandfather was campaigning for re-election. They were both eight at the time. They are still married, have three children and live in Pennsylvania.

[Ans] David Eisenhower, grandson of President Dwight Eisenhower, married which President's daughter?

Step 1 : Introduction to the question "David Eisenhower, grandson of President Dwight Eisenhower, married which President's daughter?"

On this day in 1968, Julie Nixon and David Eisenhower, both progeny of United States presidents, tied the knot in New York City. Julie Nixon was the daughter of Richard M. Nixon, who was running for president at the time of the wedding. Her groom was the grandson of Dwight D. Eisenhower, who served as America’s 34th president. Julie and David met at the Republican National Convention in 1956 while his grandfather was campaigning for re-election. They were both eight at the time. They are still married, have three children and live in Pennsylvania.