While scholars argue the merits of former presidents, recent or otherwise, there is scant effort to determine their ratings as subjects for anagrams. Although I haven't made a survey of anagrams found in chief executives, I've spent some time trying to find computer-generated anagrams for some recent ones.
"Anagramming Spiro Agnew,"
Word Ways: Vol. 23
, Article 21.
Available at: http://digitalcommons.butler.edu/wordways/vol23/iss3/21