It's not called a subpoena. It's called a subpoena letter. The subpoena letter is in reference to the enclosed subpoena.
Then... PRODUCE THE SUBPOENA FROM BEFORE THE OFFICIAL VOTE
You claim it exists. Produce it.
Why? There wouldn't be anything in the actual subpoena that isn't in the subpoena letter, except maybe an address. FOIA requests take a couple months and cost like $50.