That would have been an anachronism, as Nixon wasn't even president yet. Their peak was while LBJ was president, and they broke up a little more than a year after Nixon was president.
It looks like none of their songs even charted on the Top 100, but their albums got as high as #23.
Country Joe was a despicable man but managed to capture the war in the perspective of the soldier on the ground with an M-16 in his hands. Those kids were sent over there and were the most formidable force but were not allowed to fight in the manner of which to win as were our Air Force and Naval Air forces also restrained. This is on LBJ and Robert McNamara. Oddly LBJ was a patriot and corrupt but had advisors that were not patriots. He listened to them and thus made many bad decisions.
Why are some of my friends dead from the sixties in a war we could have won quickly and easily if we truly went to war. We did not go to true devastating annihilation war. My friends died and we lost.