Jimmy Carter, the first Social Media President? Sure, why not? Because on March 5, 1977 Jimmy Carter did something that no other Chief Executive had done before him: host his own Ask Me Anything. 

With CBS commentator and anchorman Walter Cronkite sitting next to him, President Carter fielded 42 questions (selected from over 9 million calls) from United States citizens ranging from the gasoline tax to Uganda to the Yankees playing an exhibition match in Cuba - with no screening and no prepared notes. 

It was a one of a kind event, as Walter Cronkite noted in his introduction: 

This is a unique occasion, in the sense that it marks a new approach to communication between the President and the people of the United States. It is indeed historic--unique, historic--and we must also say an experiment since the President has never taken part before in this sort of a broadcast.

The event was so unique, in fact, that it never happened again. Which is kind of a shame because it seemed like a good idea. Such a good idea, in fact, that Reddit would popularize this type of Q&A session over 40 years later.