Upvote:6
Your citizenship status does not matter for domestic flights. All you need is a form of identification document that is accepted by the TSA.
If you have one of those in hand, you can fly.
Upvote:8
What is needed is an acceptable photo ID, e.g., a Mexico passport if you also have one of those. Your citizenship is not relevant on a domestic flight. From the official list, there are also other IDs you may already have.