I vividly recall that Seeger DID sing "and the damn fool says to push on" on the Smothers Brothers' Comedy Hour. I believe he wrote the song specially to perform on the show. "Nervous Nellie," was an epithet that LBJ had applied to people who were advocating ending the war quickly or, as the President put it, who wanted to "cut and run."

Not long after Seeger's appearance - possibly his first on network TV in years, if ever - CBS cancelled (maybe didn't renew) the popular show. They said it had nothing to do with Seeger's song.

The Brothers had lots of trouble with CBS censors because they made funny allusions to drug use and frequently poked fun at politics.