The committee came into its own when it acted on suspicions that some people with Communist sympathies and affiliations worked within the United States government. The background to this was the fact that radicals in the 1930s had often been attracted to [[Marxism]], particularly to the "[[Popular Front]]" . Several of these people had reached positions of power during World War II and the late 1940s. | The committee came into its own when it acted on suspicions that some people with Communist sympathies and affiliations worked within the United States government. The background to this was the fact that radicals in the 1930s had often been attracted to [[Marxism]], particularly to the "[[Popular Front]]" . Several of these people had reached positions of power during World War II and the late 1940s. |