The two highlighted examples that best identify the basis for McCarthy’s fear of the spread of communism in the world and in the United States are:
- "in less than six years the odds have changed from 9 to 1 in our favor to 8 to 5 against us."
- "When a great democracy is destroyed, it will not be because of enemies from without but rather because of enemies from within."
These statements highlight his concern about the increasing power of communism and the potential internal threats to democracy in the United States.