I read this when I was in Middle School in the late 1960s/ early 1970s and I had a brother in active duty in Vietnam trying to stop the “Domino Effect” of Communism from overtaking the free world.  I believe it was written by an author who specialized in this genre.  The plot was that the United States was being drawn into a war between the then Red China and Soviet Union by both sides that was threatening to become nuclear.  The US President was keeping the nation neutral, until warheads were pointed at the opponent’s shores, MAD was close, and the leaders of both governments were imploring that the United States side with them to turn the tide.  The end of the book never said which country the US supports, but the Soviet leader says something like, “you need to fight on our side – at least we both are of the white race” near the cliffhanger of the novel.

I would love to quote this book in a text book I am writing these many years later, but cannot identify it.  Please help!