It may just be a class A misdemeanor - that's still good for up to a year in jail.
This is how I interpret it, but under the Texas statute for forgery (the only unclear issue is whether an "intent to harm" occurred, and most cases would support that the loss of office would constitute harm):
(a) For purposes of this section:
(1) "Forge" means:
(A) to alter, make, complete, execute, or authenticate any writing so that it purports:
(i) to be the act of another who did not authorize that act;
(ii) to have been executed at a time or place or in a numbered sequence other than was in fact the case; or
(iii) to be a copy of an original when no such original existed;
(B) to issue, transfer, register the transfer of, pass, publish, or otherwise utter a writing that is forged within the meaning of Paragraph (A); or
(C) to possess a writing that is forged within the meaning of Paragraph (A) with intent to utter it in a manner specified in Paragraph (B).
(2) "Writing" includes:
(A) printing or any other method of recording information;
(B) money, coins, tokens, stamps, seals, credit cards, badges, and trademarks; and
(C) symbols of value, right, privilege, or identification.
(b) A person commits an offense if he forges a writing with intent to defraud or harm another.
(c) Except as provided in Subsections (d) and (e) an offense under this section is a Class A misdemeanor.