Incidentally, the "sun came shining" verse, which I like, is not in the DT either.

A couple years ago, when Mudcatters were discussing this song, I polled my physics class at Espanola Valley High School here in New Mexico. Not one had heard the Communist verses. However, everyone had learned the song in elementary school--except for the one Indian girl in the class, who had gone to elementary school at the Pueblo. I guess the irony would have been a little too pointed.