Nope, by then the USSR and China had fallen out and hated each other, and neither wanted to fight with the US. The “we can’t use our full strength because we don’t want to risk provoking Russia and China” is precisely the kind of mentality the fifth columnist propagandists promulgated in the US as they were instructed to do by their Soviet masters.
It was a three pronged approach, 1, was to question the legitimacy of US involvement, including the whole anti-war hippies movement.2. Hamstring the effectiveness of the US military by constantly using nuclear war as the bogeyman to scare the politicians from using the force necessary to win. 3, demoralize the population into believing that victory was not possible and thus stop supporting the effort.
It worked.
They both had troops in China and were heavily invested in the war, and when I mentioned if you knew the world situation, it was about the high war tension on the Korean border and in Europe with Russia, those two hot zones occupied most of our military.
Your use of the word “easily” was not a good choice and what I was pointing out.