[Conservativegreatgrandma]

Everyone knows Tom Harkin wrote it.

[Eric in the Ozarks]

Tom Harkin was in the septic tank cleaning business before he entered politics.

[HereInTheHeartland]

"Everyone knows Tom Harkin wrote it."

Bahama Tom isn't nearly smart enough to have written it, he just help edit one of the later versions.
I think that Harkin was the who added the section called "Marx's wisdom for the brave combat fighter pilot in Vietnam"