Texas
There are many people who live in Texas and they treat their state like it’s a separate country from the rest of America and in a lot of ways it very much is. They have their own distinct culture and customs and they definitely have enough land to form a fully functioning country if they wanted to.

We do not know if Texas will ever consider leaving the rest of the country, but it might happen in the future. There has been a popular myth floating around that it could one day leave the United States. But in reality, it would never happen and the chances are slim that the rest of the country would just let it go.