The correct answer to this open question is the following.
You did not include any reference, text, or further context. We do not know what is the topic of controversy.
However, by doing some research we can help you with the following.
If you are referring to the controversy between formal science vs. pseudoscience, then the issues or problems that tend to lead to such controversies are the lack of evidence used by pseudoscientists when trying to prove something.
True scholars and scientists know that the scientific method is the only way to validate a phenomenon. The results can be repeated one, two, and three times, and scientists had to validate the results every single time. Then, we can say that something has scientific support and validation.
On the contrary, pseudoscientists often times do not include validation, just opinions, and general comments based on their own perspectives.
The answer is The increased opposition to war.
Nixon was not popular with his foreign policy of war to fight communists. During his term, people held numerous strikes that showed that the people were against its implementation. They don't want numerous soldiers to get involved and suffer. They also don't want people from foreign lands to lose their lives because of this.
The United States came to the aid of South Korea at the head of a United Nations force composed of more than a dozen countries. Communist China joined North Korea in the war in November 1950, unleashing a massive Chinese ground attack against American forces. The Soviet Union also covertly supported North Korea.
