The link seems to mention only James Buchanan. (?) Wonder where the rest of the list is.
It has him an #43 which, if they use the usual erroneous method of counting Grover Cleveland as two different people, would put him second from last.
EDIT: ah here we go -- just had to eliminate the "2" from the end of the URL and that takes you
here, which links to the overall study
here, but then you hit a paywall.
See, this is why walls are a bad idea.
I can see enough page to copy this:
>> This statistic ranks all U.S. Presidents from Washington to Trump using "Presidential Greatness" scores from the annual survey of current and recent members of the Presidents & Executive Politics Section of the American Political Science Association. In 2018, President Donald Trump, debuted on the list in last place with a Presidential Greatness score of 12. <<
I have to question if it's fair to assess an ass who's still in office. We can't see the future so there's no reason Rump can't work to shave that 12 down to a three. Or even a negative number.