Final answer:
McCarthyism, the practice of making accusations without evidence, had lasting impacts on American society and politics, blurring lines of dissent and disloyalty.
Explanation:
McCarthyism refers to the practice of making accusations of subversion or treason without proper regard for evidence. It had long-term effects on American society and politics, leading to the blurring of dissent and disloyalty, fear among politicians to sponsor progressive legislation, and a period of consensus that hindered critical decision-making.
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