According to Bobby Knight, Harry Truman was one of the three greatest presidents because he had the "guts to drop the bomb in 1944" on Japan.*
Donald Trump, he said, could join that list as one of the four greatest presidents because he "would do the same thing."
The scary thing is that Knight is probably right about Trump.
(*As Political notes, the only historical problem with Knight's comment is that Truman authorized the nuclear bombing of Hiroshima and Nagasaki, Japan, in 1945. Franklin D. Roosevelt was still president in 1944.)