Chronic post-WW2 shortages and a perceived FUBAR in Korea (Not necessarily incorrectly, particularly on the MacArthur debacle), as well as generally coming across as an autocratic little jerk who was also a DC outsider pretty well meant he was totally out of political allies by the election time in 1952...much like LBJ 16 years later, except he was an autocratic big jerk with a dash of psycho thrown into the mix.