Counterfactual history. Had Roosevelt died in 1944 a left-wing President Henry Wallace would have appointed Communists as his secretary of state and his treasury secretary. Wallace once mentioned that if he'd been president he would have made Laurence Duggan, a State Department specialist on Latin America, his secretary of state and, for his treasury secretary, Wallace said he would have chosen Harry Dexter White. Both Duggan and White were probably communists.
And yet we hear little about Henry Wallace and much about Joe McCarthy.