Mrzy, you said

In many states, atheists are legally barred from holding certain positions, like judges, senators, representatives, and other government posts.

Do you have documentation for this? Given the constitutional provision for seperation of church and state, It seems highly unlikey, I'd like to see examples. Is the March target to get specific discrimantory legislation off the books?

By the way, the original title of the song was "God Blessed America for me" and it was completely meant in a sarcastic way. It was a rebuttal of Irving Berlin's "God Bless America" I think "This Lands is Your Land" sung as Woody wrote it would be perfect for your March.