Final answer:
McCarthyism refers to the anti-Communist hysteria and techniques used by Wisconsin senator Joseph McCarthy. McCarthy made accusations of disloyalty without evidence.
Step-by-step explanation:
McCarthyism refers to the anti-Communist hysteria and techniques used by Wisconsin senator Joseph McCarthy.
McCarthy made accusations of disloyalty against individuals and government agencies without providing evidence. McCarthyism is named after Joseph McCarthy, who used unfair tactics to accuse people of disloyalty without proof.