That list is very bogus;
Fopr instance Woodrow Wilson, the guy who introduced Fabian Socialism to our government..the one whom FDR and Obama are the natural successors to is rated above R Reagan. Don't forget, Wilson's wife ran the office for some time after Woodrow "lost it'.
Then comes LBJ..part of the "gang that couldn't shoot straight". He took a conflict that was generally progressing and through his political meddling, screwed up the whole thing. Johnson however (according to this dizzy list), rates above the man (R.R.) who brought down the iron curtain, virtually ending the cold war and freeing millions from a Communist yoke.
Does JFK really deserve to be #6? What was his great accomplishment that places him there? He did have a confrontation with the Soviets on the high seas, but what else could he have done? Other than Jimmie Carter, probably any of the presidents of that era would have done the same, being forced into it as he was. I very much doubt however, that many of them would have transported troops to and promised support for ..the "Bay of Pigs" operation ...and then run out and left the trusting troops on the beachhead to get slaughtered. Does he really rate a #6?
Frankly, he was not in office long enough to prove himself.
Obviously, the list is as mixed up as the college professors who participated in it!