One measure employed during the Cold War was to question prospective citizens about whether they had ever been members of the Communist Party, a recognition that communism was an ideology fundamentally hostile to the American way of life.

WSJ: Why the U.S. Needs a New Loyalty Oath

The ideology of communism is long gone, and the legitimacy of the ruling party depends upon economic growth and ethnic Han nationalism.

CNN: Don't fear the rise of China

In the Cold War, freedom defeated the ideology of communism and led to a democratic movement that freed the nations of Eastern and Central Europe from Soviet domination and today these nations are allies in the war on terror.

NPR: Bush Reaffirms Iraq Strategy