I was searching for something else when I came across this material on the counterintelligence of this country during the 'cold war'. Couple of things I would like to point out, the first being the importance of understanding that the key is the word 'counter'. Something has to have happened before hand, in order for there be a need to counteract it.

In this case here we are dealing with communism,and I as of late have been suggesting that Communism had made a bigger headway into this country then the history we were taught suggests.The other point I will make is that our so called leaders allowed us as a country to get our faces punched for over 30 years before they decided,gee maybe we should do something. We all know there was a 'cold war', what most do not know, and apparently do not want to know, is just how badly we were infiltrated before we countered the foreign ideology....

.... The distinguished American historian Richard Hofstadter suggested that periodically in American history, during times of great worry, many individuals turn to “conspiracy theories” to explain away their anxieties. The early post–World War II scene was such a period. To some Americans, President Franklin Roosevelt sold out the European nations that fell victim to the Communists. The peace that Americans expected after fighting the Nazi attempt to subvert the European continent was not there. Unable to rationally explain why they failed to achieve any security, the American public believed the answer was the result of widespread treason and subversion within the nation.

President Harry Truman was bogged down in Korea but unwilling to commit the resources to win because the United States had to build up NATO to defend Europe. Because of Truman’s actions in promoting loyalty oaths for the US Government, some right wing Republicans in Congress accused the Democrats of being soft on Communism. If there were indeed traitors in the country, then the Democratic Party was responsible for them because they had controlled the government since 1932.

In 1948, Whittaker Chambers, a journalist who admitted he was a Communist Party member and Soviet spy, accused Alger Hiss, a middle-level aide to President Roosevelt, as having provided classified documents to the Soviets. The case might have faded into the dustpan of history except that Hiss lied about knowing Chambers. Caught in that lie he was convicted of perjury. Elizabeth Bentley, another former Soviet spy, also came forward at this time with her story of Soviet intelligence penetration of the government.
https://exploringrealhistory.blogspot.com/2020/03/part-1-of-2-cold-war-counterintelligence.html