"Its members and supporters swore themselves to subtly."

"and bitterly fought the deep pocket Democratic political machine of Tammany Hall."

A couple examples from the first handful of paragraphs. First is obviously supposed to be "secrecy", second I have no idea if "deep pocket" was intended or something else is missing. I really enjoy the subject matter, but your posts would be significantly improved with even cursory editing. Every few paragraphs there's something that causes the reader to have to stop and figure out what you meant. Apologies for the critique, but the last few posts have had more than a few of these.