Further study of the American Political Science Association Presidential poll of 2014 reveals the following:
The most overrated Presidents are John F. Kennedy, Ronald Reagan, and Andrew Jackson.
The most underrated Presidents are Dwight D. Eisenhower, George H. W. Bush, and Harry Truman.
These consensus judgments seem legitimate, as this author thinks those listed are an accurate assessment.
However, also underrated, and not even making the top 24 Presidents, with a 50 percent rating or above as deserving to be on the list of significant Presidents is Jimmy Carter.
Additionally, Lyndon B. Johnson will, over time, make it to the top ten, above Eisenhower and Bill Clinton, both of whom seem higher than they should be, and also above Jackson.
If any Presidents were to be added to Mount Rushmore, it is clear that Franklin D. Roosevelt is easily the most deserving, and really, no one else qualifies on legitimate grounds, even though there are supporters of Kennedy, Reagan and Eisenhower to join him, if there were additions made, which is, realistically, not going to happen!